Our people

We’ve been boss-free since 1996.

Imagine working with super smart, super talented colleagues in a free-wheeling, innovative environment—no bosses, no middle management, no bureaucracy. Just highly motivated peers coming together to make cool stuff. It’s amazing what creative people can come up with when there’s nobody there telling them what to do.

Mike Ambinder  
Mike has a B.A. in Computer Science and Psychology from Yale and a PhD in Psychology from the University of Illinois. His job description is vague, but he thinks it probably has something to do with applying both psychological knowledge and methodologies to game design. Essentially this means he gets to play with data, perform research, and act as an in-house consultant of sorts. He is really happy that you took the time to read his paragraph.
Matthew An Steam Profile
Matthew loved to play video games as a child. His parents warned him that playing games wasn't going to get him a job in the future. After graduating from the University of Washington in 2010, he proved them wrong by landing a job at Valve. As part of Valve’s Steam Support Team, Matthew helps support our Korean community and localizing efforts, making thousands of Korean Steam users believe we actually have offices in Korea. Matthew also uses his Photoshop skills to help make sure advertisements for sales and promotions get properly translated and presented to Steam users in Chinese, Japanese, Russian, Spanish, French, and German - just to name a few. In his spare time he enjoys playing soccer and any first-person shooter game he can get his hands on.
Jeff Ballinger  
Jeff's projects include Half-Life 2, Lost-Coast, Day of Defeat. Team Fortress 2, Left 4 Dead 2, and DotA 2. He is responsible for concepts, world textures, prototyping levels, architectural studies, and model making. In addition to working on world environments you can find him sketching, modeling, and learning new art techniques.
Ken Banks
Before joining Valve in 2010 as a Level Designer and Artist, Ken Banks previously worked on titles including Doom 3, Quake 4, and Borderlands. His career was inspired by his first real gaming experience on the PC, Valve’s Half-Life, in 1998. He became established in Half-Life’s flourishing mod community as a contributor to the successful Natural-Selection, which helped launch his career into game development at the age of 18.
Aaron Barber  
Aaron got his first taste of 3D environments when he was studying engineering at UCLA. He was building VRML websites for the university, and also designing levels for Quake and Duke Nukem 3D with several Internet mod groups. His level design skills landed him a job at Xatrix Entertainment where he worked on Redneck Rampage, Quake 2, and Kingpin. After Kingpin, he took a senior design position at Electronic Arts where he worked on James Bond before coming to Valve. Outside the world of game and level design, Aaron likes playing music around Seattle. www.nineteen5.com.
Jeep Barnett
Jeep quit his janitorial job at Fred Meyer to turn his programming hobby into a career. Jeep's love of video games (and fear of returning to a life of toilet scrubbing) drove him to earn a B.S. Degree from the DigiPen Institute of Technology in Redmond, WA. His senior game project, Narbacular Drop, morphed into Portal after Valve hired Jeep and his DigiPen teammates.
Mike Belzer
Playing with G.I. Joes and video games as a kid really paid off for Mike. First, he made a career in stop motion, animating Gumby and the Pillsbury Doughboy, and the films Nightmare Before Christmas and James and the Giant Peach. Then, in 1993, he was introduced to CGI at Pixar – and he really LIKED IT. For the next 12 years, Mike worked at the Walt Disney Animation Studios on such projects as Dinosaur, Kangaroo Jack, Meet the Robinsons, and Bolt. Now he's at Valve making games. When he's not playing with pixels, Mike’s spending time with his wife and kids.
Jeremy Bennett
Before joining Valve, Jeremy worked at Weta in New Zealand. He was the Visual Effects Art Director on The Lord of the Rings trilogy and the Conceptual Designer on King Kong. In 2003, Jeremy won the Visual Effects Society’s Best Art Direction in a Motion Picture award for his work on The Lord of the Rings: The Two Towers. Since joining Valve in 2006 he has worked on Half Life: Episode 2, Left 4 Dead and Left 4 Dead 2, Portal 2, and several upcoming titles. When he's not at work Jeremy can be found surfing the many breaks off the Olympic Peninsula, or building Lego space ships with his two boys.
Yahn Bernier  
Yahn was an Atlanta patent lawyer with a degree in chemistry from Harvard. So obviously he ended up in Seattle developing computer games. He taught himself to program at the age of 12 and has worked on the systems code and tools for most of Valve's titles. Yahn's proudest moment was when he was able to edit the text of this paragraph, after leaving it unchanged for more than a decade.
Jason Brashill  
Jason worked on British comics 2000ad and Judge Dredd Megazine as well as concept art for many games. His free time was spent mostly “enhancing” (other people’s) property with spray paint. Jason eventually skipped town and now resides near Seattle where he does all manner of arting at Valve and no longer pursues his extra-curricular activities in any way shape or form. Honest.
Charlie Brown  
Another Fort Walton Beach, Florida native, Charlie graduated from the University of Florida in the summer of 1994 and headed for California and 3Dfx Interactive. His responsibilities there included developer support, porting products to hardware, sample code, simple demos, and ultimately working with the 3Dfx developer relations team to manage the engineering game porting effort. Charlie left 3Dfx after two years and, with his college friend Gary McTaggart, created the Uber(tm) Engine at Ritual Entertainment in Dallas, Texas. Not long after joining Ritual, Charlie and Gary left to start their own company. Not long after that, Valve made Charlie (and Gary) an offer "they couldn't refuse."
Tom Bui
Tom graduated from the University of California-Berkeley with a Bachelor's degree in Computer Science. Like most software engineers at the time, he decided to join an Internet startup and become a millionaire before turning 30. When that didn’t happen, and after the Internet bubble burst, he decided to forget all that web-based, e-commerce stuff and pursue his real dream: making video games. He joined Midway Games West (formerly, the original Atari). That studio shut down a few months later, so Tom moved on to Maxis where he worked on titles such as Darkspore, Spore, and The Sims 2 (and many of its expansion packs). Since joining Valve in 2010, Tom has worked on Team Fortress 2, Portal 2, and small parts of Steam. He's also the beneficiary of one of the best fan tributes we've ever received.
Tobin Buttram
As a music major, Tobin fully expected to have a career in food service. Instead, he spent most of his twenties touring and recording with Robert Fripp and The League of Crafty Guitarists, which led, somehow, to Microsoft in 1996, where he worked on Interactive Music Architecture (DirectMusic) and then as an Audio Director at Microsoft Game Studios, primarily with FASA. Tobin joined Valve in 2008 and is blown away every day that, in addition to doing audio production on some of the coolest projects in the whole wide world, he’s allowed to tinker with the audio calls in the game code, and encouraged to learn more about that side of the process every day.
Chris Carollo
Chris spent his college years working on Quest, a Quake level editor. His first real job was at the Massachusetts-based Looking Glass Studios where he worked on sound and physics for Thief. (His Thief handiwork included the revolutionary and tragically forgotten "sphere hat" primitive.) After a few sweaty years in Texas working on the Deus Ex sequel for Ion Storm Austin, Chris joined Valve. He still enjoys being able to step out of doors without bursting into flame.
Dario Casali  
Dario started designing levels for Doom while he was studying economics at the University of Oxford in England. After building "Final Doom: The Plutonia Experiment" with his brother, he joined Valve where he discovered that it was actually possible to have a career in games. Upon graduating from Oxford in 1996, he decided that the finance world would just have to wait. After all these years in the U.S., Dario still stubbornly refuses to give up his accent, and happily endures being the subject of British jokes on a daily basis.
Matt Charlesworth
Matt grew up in Nottingham in the UK. He blagged his first job in videogames 20 years ago when he started working at a British studio called Core Design on a new game called Tomb Raider. Remember that one? Many sequels later he moved to Canada where he worked at Bioware (on Mass Effect) and then at Blizzard/Activision in Vancouver. When Matt joined Valve in 2008 he got straight to work crafting characters for Left 4 Dead 2. By adding a simple lacey undergarment, he managed to help make the Spitter even grosser than was previously thought possible.
Greg Cherlin
Hail and well met, adventurer. Would you like to purchase the [a piece of paper]?
Jared Christen  
Jared has worked with Steam Support since 2010 and is currently focused on the quality of our interactions with customers. If you have feedback around a Steam Support request that you’ve had, send it his way!
Phil Co  
Phil Co graduated from the University of Virginia School of Architecture in 1994 and moved to the San Francisco Bay Area hoping to be a rock star. When the rock star thing didn't work out, Phil turned to his second choice: level design. He started at Cyclone Studios, working on Requiem: Avenging Angel. He went on to design levels at Infinite Machine, Knowwonder, and Blizzard North before coming to Valve in 2005. He is also the author of the book Level Design for Games.
Greg still works here.
Christen Coomer   Steam Profile
Christen joined Valve after serving ten years at Microsoft, where she designed a variety of consumer products and platforms. Since they let her go on good behavior, she’s joined the Steam team, where she designs, produces, tests, ships, and markets new features with the team of Steam engineers. And her brother. Have feedback or suggestions about Steam? Send 'em her way!
Tony Cox
Tony started out in the games industry in 1995 at British developer Bullfrog, where he worked on a variety of titles including the PC gaming classic Dungeon Keeper. He joined the DirectX team at Microsoft in 1998, before relocating to Redmond in 2001. During his tenure at Microsoft he led the software engineering team for Microsoft Studios publishing, contributed to Xbox platform architecture, and led the development of mobile titles including Galactic Reign and Age of Empires: Castle Siege. He joined Valve in 2015.
Scott Dalton
Scott began playing and designing games at an early age on an Atari 800 and never looked back. He came to Valve after creating games at Legend Entertainment for many years. Aside from level design and game mechanics, he delights in creating particle effects and programming the system that drives them. When not making worlds come to life, he's usually making them explode, bleed, and burn. He helped to spin up the hardware teams at Valve and currently is working on the Steam Controller.
Ariel Diaz
Originally from San Juan, Puerto Rico, Ariel came to Valve after finishing his studies at the Savannah College of Art and Design. As part of Valve’s character design team, he is responsible for creating character models, facial expressions, and skeleton deformations. Outside Valve, he pursues traditional art skills such as drawing, painting, and sculpting.
Quintin Doroquez  
"Q!" brings over 10 years of multi-disciplinary graphic design experience to Valve. He has had a creative role in launching print, online, and new media endeavors as a senior art director for Incite PC Gaming magazine, art director for PC Accelerator, and associate art director for PC Gamer. At Valve, you can find Q!'s schedule filled with marketing, packaging, web design, game trailers, .dem file creation, and other visual communications tasks. In his spare time, Q! likes to reminisce about how he was training to be a competitive bodybuilder 14 years ago. Get over it, already!
Mike Dunkle
Mike joined Valve in 2000 after spending 10 years in senior marketing and business development positions in the semiconductor test and embedded software markets. At Valve, Mike is responsible for general business development, including Source Engine licensing, Steam content distribution, Asian distribution, and tournament licensing. During his spare time, he enjoys coaching high school and premier club soccer teams. Mike's ideal Sunday afternoon is spending time at a soccer game with his wife and son.
Dhabih Eng  
(pronounced ZA-bee)
Dhabih, who's been playing games since he was six years old, has a degree in Interdisciplinary Art from the University of Washington. He started making a name for himself by doing freelance design work for gaming magazines (Electronic Gaming Monthly, Official Playstation Magazine, PC Gaming World) while still in school. Dhabih has also done web design and worked on the Quake2 TC pack Zaero from Team Evolve. He started at Valve by doing freelance work in mid-1998, and signed on full-time in early February of 1999. Dhabih is truly a world citizen, having grown up in six different countries (Australia, Macau, Canada, China, Taiwan, and the USA). You can find out more about Dhabih and check out some of his work by visiting his website.
Miles Estes  
Miles began his career at Foundation Imaging in Southern California as a character animator on the Starship Troopers TV series. Shortly thereafter, he got his start in games - lead animator for Interplay's PS2 game Run Like Hell. Upon joining Valve in 2001, Miles was inhumanely forced to participate in company playtests. As a result, he developed an addiction to Counter-Strike, despite the fact that he was really bad at it. He has since overcome his addiction and contributes character modeling and/or animation to a lot of Valve games. His hobbies include lamenting over the fact that he's not drawing enough.
Al Farnsworth   Steam Profile
After a couple of years spending too much time in meetings at Amazon.com, Al made the trip across Lake Washington to join Valve as a web developer on the Steam team. When he's not playtesting Team Fortress 2, Al works on the Steam store and other Valve websites.
Dave Feise
Dave came to Valve in July of 2009 after five years at Electronic Art's Redwood Shores studio where he worked on Dead Space and The Godfather series. When he’s not rattling the walls at Valve with dangerously loud sound effects, Dave enjoys playing music, fly fishing, cooking, and Polaroid photography. A Seattle native, Dave is a graduate of California’s Ex'pression College.
Vitaliy A. Genkin  
Vitaliy grew up in the Soviet Union. He earned two Master's degrees (with honors) and a lieutenant rank. He solved thousands of differential equations systems, then architected and implemented software that has probably processed petabytes of binary data by now. And then, he moved to Santa Monica to help Sony lay the foundation for PlayStation-3. Vitaliy joined Valve in 2006 and helped us ship The Orange Box, our first Xbox 360 game. He went on to establish our matchmaking system, implement the PlayStation-3 version of our engine, and design and improve our numerous back-end systems.
Tom Giardino  
Tom is a graduate of the University of Washington Foster School of Business and an alumnus of Teach For America. After teaching and coaching at a high school in rural Mississippi, Tom started working for Valve. Now he spends his days on the Steam Business team, helping the people who make PC games connect with the people who play PC games.
Bronwen Grimes  
At age 17, Bronwen took a break from high school to attend a post-graduate course in 3D animation. (Well, why not?) At the end of the program, she was both disappointed and delighted when a visiting industry professional told her she'd never make it as a character animator, and ought to think about becoming a technical director instead. Stunned to learn that there was a profession where you could create artwork and code, she embraced a career in technical art. Three years later, she'd collected enough credits in both disciplines from various institutions to graduate from Seneca College in Toronto, Canada, with a degree in Digital Media Arts. She promptly landed a job at Toronto's Pseudo Interactive and never looked back. Now at Valve, Bronwen gets to do a little bit of everything, just like she always wanted -- well, except for the animation. Which is probably for the best.
Joel Hatfield
Joel came to Valve in May 2011 to assist with front office and administrative responsibilities. Having a real estate background, he quickly investigated different organizational methods and operations to streamline all types of housekeeping chores to make sure the people behind the great games and services here at Valve are able to focus on what they do best.
Don Holden
While studying computer science at Cornell University’s College of Engineering, Don would disappear for months at a time - into his dorm room or “The SUG” (Cornell alums UNITE!). He was busy making computer games and graphics demos. His obsession helped him land a couple of summer gigs at Valve, where he worked, under the tutelage of Ken Birdwell and Chris Green, on making vrad.exe faster. After getting his Master’s degree, Don joined Valve full-time. He’s still working on graphics stuff.
Eric Hope
Before joining Valve, Eric worked as a designer for Apple – working on products like Apple's iPod Classic, iPod Nano, Developer Forums, and WWDC iPhone app. These days, when he isn't designing at Valve, he can be found, sandpaper in hand, feverishly rounding the sharp corners off of anything within reach. If you happen to drop by one day and catch him doing so, perhaps in the wee hours of the morning, he will guiltily offer you a tract detailing the life and work of Dieter Rams.
Brandon Idol
While growing up in the mountains of North Carolina, Brandon often retreated to the family basement to play video games or guitar - and daydream about getting paid to do either. He wound up earning a degree in computer animation, and using his considerable animation skills to help establish the visual style for many games, including Final Fantasy IX, Warcraft III, and World of Warcraft. Brandon now spends his time at Valve creating backgrounds, pointing spotlights at extreme angles, and being slightly irresponsible with color. He still plays guitar.
Brian Jacobson  
As a child, Brian learned how to program by cracking all the computer games he couldn't afford to buy. As an adult, he decided to join the games industry as a way to make up for his reprehensible childhood. At LookingGlass, he worked on Flight Unlimited. He went on to co-found GameFX, and was a Lead Engineer on Sinistar Unleashed. He joined Valve in 2000 and has contributed to just about everything the company has shipped since then. Brian focuses mostly on engine and graphics technology, with the occasional foray into game design.
Sean Jenkin
Sean spent his youth on the beaches of Wollongong, Australia before the lure of Microsoft brought him to Seattle. After 12 years working at Microsoft Game Studios, Xbox Live Indie Games and MSDN/Technet, Sean joined Disney to take advantage of the free entry to Disneyland (used twice, doh!). After a few years commuting back and forth to California, Sean came to Valve where he now works with Game Developers around the world supporting their integration with Steam. Sean also spends parts of his day developing the next generation video streaming platform for Steam.
Erik Johnson  
Erik began his career as a shoe salesman and moved up to selling used cars. When he decided that the car business wasn't for him either, he took a job in Sierra Online’s QA department. As one of Sierra's Half-Life testers, Erik spent a lot of time at Valve and we eventually offered him a job as shipping manager. Erik is now one of Valve’s business development authorities.
Chris Kadar
Liked Adrian's old bio.
Emily Kent
Emily works on the UI for Steam; community, support, sales, and security. Prior to Valve, Emily spent time working at Xbox, a mobile start up, frog, Jackson Fish Market, and Microsoft's Pioneer Studios. Emily wants you to protect your account with the Steam Guard Mobile Authenticator.
Iikka Keranen
Having escaped (or been let loose?) from a secret bio-research lab in Siberia, Iikka started to design and program games at an early age. However, it wasn't until he began to create levels and mods for Doom and Quake that he became known to the world. In 1988, he left the pack of wolves that raised him for a job at ION Storm in Dallas, Texas. A few years and adventures later, he found himself at Valve. That was 2001. He hasn't had the urge to bite anybody since.
Phil King
Phil's first games were written on a Commodore PET in the 1970s. He first got paid for working on games at Stormfront Studios in the mid 90s, before eventually chucking that to return to hardware engineering. He subsequently worked on free-space optical networking of laptops for kids, metropolitan area router boxes, educational toys, acoustic gunshot location, and light field cameras, before finally returning to the games industry to work on VR at Valve.
Dave joined Valve in 2005, fresh from the DigiPen Institute of Technology, where he helped create the mind-bending student project (and Portal precursor) Narbacular Drop. His primary contributions to Portal and Portal 2 involved developing the graphics and physics systems that make the games’ unique discontinuous spaces work seamlessly in a 3D environment. With the addition of multiplayer in Portal 2, Dave then made those spatial discontinuities work with nonlinear prediction. Dave has also contributed to Left 4 Dead games and Xbox360 support for the Source engine. He is known within the company for his ability to quickly find new exploits in game mechanics.
Eric Kirchmer  
Eric has been an artist with Valve since 2002. In that time, he has helped with the visual design of Half-Life 2, Team Fortress 2, Left 4 Dead 2, and other Valve titles. Originally from Southern California, Eric now calls the Pacific Northwest home.
Alden Kroll Steam Profile
Alden has a habit of ending up in the middle of everything. If he isn't getting in the way of Steam game releases, he’s probably working on UI design for Valve games or the Steam store. Alden came to Valve after working on design and production for the Xbox 360 Dashboard. Before that, he studied design at the University of Washington and worked on various freelance design projects. When he’s not working, Alden can be found chasing his competitive ambitions in cycling and swimming. He commutes to work by swimming back and forth across Lake Washington every day. Most weekends, he relaxes by riding his bike to Portland. Twice.
A memory of Marc Laidlaw
"The way ahead is dark for the moment. What seems to you a sacrifice is merely, to us, an oscillation. We do not fear the interval of darkness. We are a tapestry woven of vortessence. It is the same for you if only you would see it. How many are there in you? Whose hopes and dreams do you encompass? Could you but see the eyes inside your own, the minds in your mind, you would see how much we share. We are you, Freeman. And you are us."
Jeff Lane
Jeff began his career as a graphic designer in the print industry. Over the course of 12 years, he moved into graphics for video projects, then graphics for commercial multimedia, and finally graphics for games. He hasn't looked back. After making 3D art for Hyperbole Studios’ Quantum Gate interactive movie projects, Jeff spent five years as an art director and level designer at Sierra Studios before coming to Valve.
Tim Larkin
As a freelance composer and musician, Tim has done it all. He played trumpet for the likes of Ella Fitzgerald, Sheila E., Lou Rawls, Huey Lewis, James Brown, and Natalie Cole; recorded numerous records, movies, documentaries, and TV shows (including Survivor and Fear Factor 2.0) as a studio musician; created the sound design for The Chubbchubbs!, a 2003 Academy Award winner for Best Animated Short Film; and as Audio Director at Cyan studio for eight years, created the music and sound for the Myst series. Now, he’s here at Valve, where he’s worked on just about every title the company has shipped. When he’s not working, Tim is playing tennis, fly fishing, or commuting back and forth to his home and family in Spokane, WA.
Liam Lavery
Liam showed early promise in his summer job at General Motors making car transmissions. Twice, GM and the UAW awarded him a Certificate of Perfect Attendance. But Liam left the assembly line for the classroom, teaching college and junior high math until a professor named Yau (that would be the Fields Medal-winning Shing-Tung Yau) convinced him to look for other work. Liam’s interest in understanding the rules that govern society led him to law school, and then to Seattle’s K&L Gates firm where he specialized in technology and business law and worked with a number of game companies, including Valve. Right before joining Valve, Liam served as general counsel of Zillow.com.
Matt Logue
As a paint fixer and rotoscope artist at the legendary Tippett Studio, Matthew painted a pimple out of Darryl Hannah’s armpit for My Favorite Martian and rotoscoped Kevin Bacon in a black bodysuit for Hollowman. He moved on to legendary Weta Digital to work as an animator and animation lead for The Lord of the Rings trilogy. He came to legendary Valve from Los Angeles where he was the animation supervisor on The Chronicles of Narnia; The Lion The Witch and the Wardrobe, the longest title of any film he’s ever worked on. He’s now animating on Dota 2. Matthew had been eyeing Valve for awhile and is happy to report that he and his family like Seattle much better than LA, although the weather reminds him of that Ray Bradbury short story (All Summer in a Day) where the sun only comes out for two hours every seven years.
Doug Lombardi  
After years in the music industry, Doug decided to get a real job. Then he came to his senses and got into the gaming industry instead. As Valve’s Vice President of Marketing, Doug helps manage and coordinate third-party relations, marketing, and press activities.
Joe Ludwig  
Joe joined Valve as a programmer in 2009 and has spent his time working on item back ends, trading systems, virtual reality, and hats. These days he is helping out with the software side of Valve's hardware effort. Though he started his game industry career at Sierra in 1998, most of the intervening time was spend on trains and pirate ships during his nine years at Flying Lab software. Before that, he was never in Anthrax, no matter what you may have heard on the internet.
Randy Lundeen  
Randy came to Valve from Microsoft, where he worked as an interface designer for the Internet Gaming Zone. Randy designs some of the most unusual and original game levels at Valve. He’s also the designer most likely to push the polygon and memory limits of our engine. In his distant past, he was a key staff member at a potato processing plant where his responsibilities included peeling and quality oversight. He was really good at that too.
Scott Lynch  
Before joining Valve, Scott was Senior Vice President at Havas Interactive where he created and managed the Sierra Studios business unit that published Half-Life. During his five years with Sierra, Scott held a number of different positions in business development, acquisitions, finance, investor relations, and product development. Before Sierra, Scott worked in the public accounting industry for Coopers & Lybrand. In both the audit and tax departments, he managed a range of clients, from small start-ups to Fortune 500 companies. Scott is a graduate of the University of Washington Business School (with a concentration in accounting), and is an inactive Certified Public Accountant in the State of Washington.
Ido Magal
In 2001, Ido joined Valve to do art and design levels. He also enjoys photography, foreign films, and advising the President about issues of national importance.
John McCaskey
John spent his post college graduate years at a struggling Web 2.0 startup, lured in by the illusion of stock option riches. Since arriving at Valve, he's landed on the Steam team where he works on a little bit of everything, from Shopping Carts to the in-game Overlay. His favorite thing about Valve is having a huge, energetic user base, which benefits from the work he does on Steam.
Sergiy Migdalskiy
A bit of an odd-ball, Sergiy joined Valve to do weird low-level stuff and squeeze more blood, um, juice out of the silicon in your gaming machines. Sergiy specializes in systems programming, physics, and applied math. According to him, some games pretend to be simulating physicsy-looking motion. Sergiy made the physics engine behind Uncharted: Drake's Fortune while at Naughty Dog, and the animation system in Far Cry during his lazy years at Crytek. There were a few other odd jobs here and there, but the list is long and boring, and mostly lost in the eons that have passed.
Kristian Miller  
Kristian studied Economics and Finance at Montana State University before arriving at Valve in 2012. He started on Team Fortress 2, where he worked to better understand player interactions with crates, name tags, and Hats of Undeniable Wealth and Respect. Kristian currently works with the Steam team, where he focuses on platform growth, virtual reality, and development of partner’s in-game economies.
Jason Mitchell
After eight years leading ATI's 3D Application Research Group, Jason was finally seduced by the entertainment industry. He's now putting his 3D graphics hardware knowledge to use on just about every project at Valve. Jason frequently publishes on a variety of real-time rendering topics and periodically speaks at graphics and game development conferences around the world. While joining Valve has significantly cut down on Jason's international jet-setting, he's still the man to see if you're looking for a stuporous late night Tokyo karaoke escapade.
Mike Morasky  
Morasky's life and career sounds a lot like one of the post-modern audio collages he is so fond of creating. Teenage guitar player in a bar band in Montana; award-winning experimental composer in Tokyo; audio hardware programmer in Silicon Valley; underground art rocker touring the world; 3D animator and director for television; electronic audio collage artist in France and Japan; visual fx artist on The Lord of the Rings and Matrix trilogies; AI animation instructor at an art college. These days, Mike is doing some combination of all these things at Valve.
John Morello II
John is an animator most of the time. He’s been a gamer since his parents bought their Commodore 64. As a high-schooler he made small Quake mods and became addicted to Team Fortress. After graduating, his brother introduced him to the guys on the Day of Defeat team. They wanted to ship their mod, but they needed animation help. John jumped in. Valve eventually invited John and the rest of the team to continue DoD development at Valve’s offices. At this point, John has worked on nearly every product we've shipped. His TF obsession is over - replaced by an addiction to DotA, and lapping his Ducati at local road courses.
Arsenio Navarro  
Arsenio is responsible for merchandise licensing, retail and wholesale Valve Store sales, retail product development, and event support. In his spare time you can catch Arsenio creating art, beat boxing, and playing TF2…at the same time.
Gabe Newell  
Gabe held a number of positions in the Systems, Applications, and Advanced Technology divisions during his 13 years at Microsoft. His responsibilities included running program management for the first two releases of Windows, starting the company's multimedia division, and leading efforts on the Information Highway PC. Then he started Valve. His most significant contribution to Half-Life, the company’s debut title, was his statement: "C'mon, people, you can't show the player a really big bomb and not let them blow it up."
Steven Noonan   Steam Profile
Steven is a professional Linux supremacist with a recurring NetHack addiction. He joined Valve in 2015, after four years of writing kernel, hypervisor, and emulation code for Amazon Web Services. Before that he worked for Introversion Software on their Linux ports of Darwinia and Defcon.
Martin Otten
Martin comes to us from Germany, where he earned a Master’s degree in Computer Science from Dortmund University. Martin is best known for programming “Argus” (for Quake) and "Half-Life TV” (as a contractor for Valve). Since arriving in Washington State, Martin has lost all the hubcaps on his Volkswagen and single-handedly stopped Seattle traffic by strolling across the street in a bath robe while sipping a white Russian. Not bad for a "poor German boy." Martin also enjoys listening to the band Manowar since, after all, some bands play, but Manowar kills.
Tony Paloma  
Tony got into game programming via the mod community in 2001. He created several server plugins and was responsible for the first online Team Fortress 2 backpack viewer. He continued this work as a hobby while studying Computer Science at Cal Poly in San Luis Obispo, CA. Before coming to Valve in 2011, to work on his passion, Tony spent two years at Microsoft helping to develop the next version of Visual Studio.
Karen Prell  
Karen grew up near Seattle and embarked on her first career as a puppeteer in 1980. She performed popular film and television puppet characters for 16 years, most notably Red Fraggle in Fraggle Rock and the Worm in Labyrinth. Her second career as a computer animator included work on the award-winning Pixar films Geri’s Game, For the Birds, A Bug’s Life, and Toy Story 2. She is now well into a third career in video games at Valve, tackling testing, development, and animating exuberant characters such as Wheatley the star sphere in Portal 2. Karen continues to do occasional puppet performances and enjoys yoga, kayaking, hiking, biking, and exploring the beautiful Pacific Northwest.
Elizabeth Ratto
How did a Portuguese-speaking, farm girl from Oakdale, Ca. wind up doing HR benefits and payroll administration for a video game company in Bellevue, WA? It probably had to do with her switch from accounting to HR management at Chico State; and those stints at a legal/econ consulting firm and at Gracenote, Sony’s music tech company; and the transition from San Francisco to Seattle; and that former colleague who knew somebody who knew somebody who worked for Valve. But you know what? We don’t really care how Lizzie wound up at Valve. We just thank the gods she’s here. Twice a month.. When we get those paychecks. Like clockwork.
Alireza Razmpoosh
Alireza moved to Canada (via Iran and Turkey) when he was nine. His first impressions of the west were the films TRON, Die Hard, and Lawnmower Man. Inspired by this trinity of action, art, and science he chose a career in 3D animation and visual effects. After earning a Bachelor's and a post-graduate degree in animation from Sheridan Institute of Technology, Ali went to London to start work on his first film. He was 24. He now works at Valve where he drives the effort to transform visual effects into a dynamic interactive experience – and blows stuff up.
Brandon Reinhart
Brandon Reinhart broke into the industry in 1998 when he landed a job as a gameplay programmer on Unreal Tournament for Epic Games. He spent several years at 3D Realms, Sony Online Entertainment, and Spacetime Studios working on Duke Nukem Forever, Star Wars Galaxies, and Blackstar. Brandon joined Valve in 2008 and intends to spend the rest of his life working here.
Alfred Reynolds
Alfred joined Valve as a software engineer in 2002. He has contributed to the development of Counter-Strike, Half-Life 2, and Steam. He also does his best to maintain the Linux ports of our games. Most recently, he led development efforts to bring third-party applications to the Steam platform. Prior to Valve, Alfred worked for an Australian research organization; he would be forced to kill anyone who discovered the true nature of his work there. He is also the one to blame for starting plug-ins on Half-Life servers and, in particular, for creating Admin mod.
Matthew Rhoten
Matt came to Valve from Microsoft, where he worked on stuff ranging from UI to device drivers. Like many members of the Steam team he is a generalist, meaning he genuinely finds just about everything interesting. In his spare time, Matt enjoys hanging out with his family, and learning new things via serial hobbies.
Dave Riller
Dave started working on games in his spare time back in the days of Doom and Quake. His work caught our eye and we lured him here from the East Coast to work on Half-Life. Now that he’s added code writing to his bag of tricks, Dave works tirelessly to improve the experience of every single diehard Team Fortress 2 fan. That’s right, you know who you are. It’s all for you.
Erik Robson
After earning a Master’s in Sculpture in 1996, Erik made the most of that degree by working cash registers and designing web pages. As creatively satisfying as those occupations were, he couldn’t shake the feeling that he should be doing more with his life. He spent six months creating Quake levels and, in 1998, landed a job designing levels for Cyclone Studios’ Requiem. For the next 12 years he served as Lead Designer at 3DO and Double Fine Productions. Finally, in 2010, he dragged his wife up to the Pacific Northwest and took a job at Valve.
David Sawyer
David makes cool levels that you love to play. That is all.
Wade Schin  
Wade has worked in the game industry as an artist since 1998, and for Valve since 2005. In his spare time, he participates in group art shows and experiments with 3d printing and casting.
Chris Shambaugh
Chris attended a nationally accredited university and has an actual degree in something or other. He remembers liking his fine art and filmmaking classes the most. At Valve Chris has designed UI and marketing for Valve games and Steam.
Taylor Sherman
Taylor joined Valve in 2001 to help develop Steam, and has been part of that team ever since. His previous experience ranges from DVD emulation to air combat simulators for the military. He has a Bachelor's degree in electrical engineering from The Cooper Union in New York City. In his spare time, Taylor enjoys photography, playing bass and guitar, and staring at maps.
Eric Smith  
Eric joined Valve in 2000 after graduating from the DigiPen Institute of Technology in Redmond, WA. Before DigiPen, he worked for Nintendo of America. But when DigiPen opened its doors in the U.S. in January 1998, Eric saw an opportunity to change careers and make games instead of just playing them.
David Speyrer  
David developed telecommunications software in Boulder, Colorado before he came to Valve. During his time here he's been a programmer/designer and cabal lead on Half-Life 2 and Half-Life 2: Episode Two. He has also worked quite a lot on our Hammer level editor over the years. A fan of recreational physical suffering, David goes rock climbing in his spare time. He has dragged many a pale and shaking Valve employee along on adventures in vertiginous terror.
Jay Stelly  
Jay joined Valve from Tetragon where he was lead engineer and 3D engine developer of Virgin's Nanotek Warrior. Before that, he developed titles for Sony Playstation & 3DO. Way before that, he wrote his first computer game (at age 9) and had a game published in a magazine (at age 15). A native of Cajun Country, Jay finds Northwest buildings too hot (what, no air conditioning?) and the food not hot enough.
Kelly Thornton
Kelly came to Valve via the Half-Life mod community. While earning a Master's degree in Business at the University of Missouri-St. Louis, he helped develop and do sound work for Day of Defeat. He saw a career in video game development and sound engineering as the obvious next step after the MBA - and an undergraduate degree in Biology - so he packed his things and headed west to Valve. Today, you can find Kelly in his office, surrounded by WWII books and memorabilia, wearing a fat pair of headphones, and wondering how in the world he actually landed a job he loves doing.
Alex Vlachos
Alex has focused on graphics programming and shader development at Valve since 2006 contributing to Half-Life 2: Episode 2, Team Fortress 2, Portal 1 & 2, Left4Dead 1 & 2, Counter-Strike: Global Offensive, DotA, and currently virtual reality rendering. Previously he was Lead Visual Effects Programmer at Naughty Dog during development of Uncharted: Drake's Fortune, Lead Programmer on ATI’s Demo Team for over 5 years, and he was a software developer for the SpaceOrb 360. Alex is a graduate of Boston University.
Robin Walker  
Chris Welch  
Chris began his journey to video games as a pre-med student. Much to his mother’s dismay, a few years into his studies he switched from becoming a doctor to becoming an artist. He studied animation and visual effects at Brigham Young University and went on to become a Biomedical Illustrator and Animator for large pharmaceutical, surgical, and orthopedic companies. Later he went on to work at Weta Digital in New Zealand where he led the Look/Development for Jake and Neytiri, the main (alien) characters in the movie “Avatar”. He also did extensive creature texture painting and worked on other movies as well, such as The Adventures of Tin Tin, where he painted and shaded the textures for Tin Tin himself, as well as the Captain. He has now been at Valve for several years doing character design and other game art related things. Although he sucks at actually playing video games, he loves working on them.
Erik Wolpaw
Erik Wolpaw's father attended Yale, became a successful lawyer, got disbarred, lost everything, and went to jail for a while. Later, he and Erik lived in a horrible ghetto apartment where Erik used the Yale alumni magazine to smash cockroaches. From this inauspicious start, Erik eventually went on to not graduate from high school. Now he writes dialog for video games, including the award-winning Psychonauts, Portal, and Portal 2. Prior to that he was a freelance writer and before that he co-founded Old Man Murray. It's not like he became a surgeon or anything, but it's not too bad, considering.
Matt T. Wood
At age 19, Matt left his home state of Pennsylvania for the sweltering heat of Dallas, Texas. There he became 3D Realms’ first level designer on its first real 3D game, Prey. Since then, he’s worked on Duke Nukem Forever as a designer, animator, and modeler. He also contributed to Max Payne. In 2003, Matt moved to Valve to work on Team Fortress 2 and Half-Life 2. He is (as far as we know) the only person in the world to have worked on four of Wired magazine's top-rated vaporware games. When Half-Life 2 shipped in 2004, the curse that prevented games that Matt worked on from getting shipped was finally broken. Now, he helps Valve ship games often, working primarily as a level and game designer, and gameplay programmer. Matt is happy to say that (in addition to the games mentioned above) he’s contributed to - and shipped Counter-Strike: Source, Half-Life: Episode One, Half-Life: Episode Two, Left 4 Dead, Left 4 Dead 2, Alien Swarm, and Portal 2 on multiple platforms.
Justin Yorke