Pierre-Loup Griffais of Valve tweeted, "Welcome keithp to the team! Our open graphics group is now 5 strong, but still hiring. Shader compiler performance people especially wanted."
He's now joining Timothy Arceri, Andres Rodriguez, Samuel Pitoiset, and two others working full-time on the open-source Radeon Linux graphics driver stack. It's interesting to hear that they are still hiring additional open-source graphics driver developers as well. Interesting that they are interested in shader compiler performance when the AMDGPU LLVM compiler expert, Tom Stellard, recently left AMD for Red Hat where he still appears to be working on AMDGPU LLVM and now RADV.
Griffais had mentioned in another tweet, "Yes [Keith Packard]! We badly needed display expertise. First order of business is wiring up direct mode on the open stack." The direct mode is about the VR HMD support for the display stack.
Keith Packard has worked at SUSE and Intel for a vast number of years being responsible for X.Org development while in 2015 he left Intel to begin working for HP on The Machine / Linux++. But now he's changed over to Valve. Good luck Keith!