Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Here's one of the names that many Linux gamers and Phoronix readers should know for his past open-source work, who since the beginning of May has been employed by Valve Software for their Linux enablement efforts.
One of the first people I recruited for Valve when they were looking for good Linux referrals was Forest Hale, or better known within Internet communities (including the Phoronix Forums and Phoronix IRC) as LordHavoc. He was the lead developer on the DarkPlaces engine, which is the Quake-derived engine that was used by the open-source Nexuiz game and is now used by Xonotic as well. As can be seen when firing up the old Nexuiz or when running Xonotic, DarkPlaces is both technologically and visually impressive, especially for being a non-commercial GPL-based engine. Under contract he additionally was the lead on the Mac OS X and Linux ports of Quake Live. He's also done other Linux contract work, but for the work on the open-source DarkPlaces engine is where he's arguably most known.