David "Turnstiled" Kelvin was a level designer on Blood II: The Chosen and Shogo: Mobile Armour Division. Prior to working for Monolith Productions, he was a designer for the Team Evolve mod team on Painkeep for Quake and Zaero for Quake II. After Monolith he worked on Half-Life: Opposing Force for Gearbox Software, then moved on to Legend Entertainment as senior designer for Unreal: Return to Na Pali and The Wheel of Time, and then Gray Matter Interactive Studios to work on Return to Castle Wolfenstein. At The Collective he worked on Indiana Jones and the Emperor's Tomb, The Executives, and the Star Wars Episode III: Revenge of the Sith video game.
Returning to his roots, he joined Nerve Software to work on Doom 3: Resurrection of Evil, 007: Quantum of Solace and Enemy Territory: Quake Wars, before joining id Software outright to work on the original pre-production of Doom 4. He has since worked at Electronic Arts on Medal of Honor and the pre-production on Medal of Honor: Warfighter, Infinity Ward on Call of Duty: Modern Warfare 3 and the pre-production of Call of Duty: Ghosts, Robotoki on Human Element, and Whitemoon Dreams on Starblood Arena. He returned to the Call of Duty franchise as a senior level designer for Call of Duty: Black Ops 4 at Treyarch starting in March 2018.
Klevin currently resides in the greater Los Angles area, and is fluent in English and French. In his career he has had experience with id Tech, LithTech, IW engine, Unreal Enigne, CryEngine, and Unity engine technologies. Since November 2016 he has been the founder and owner of Endless Tangent LLC, an independent game developer.