David P. Grenewetzki is an American engineer, game and software developer and CEO. David served as the Sierra Entertainment president from June 1998 - June 2001. David has programmed many software/games over his years which are The Miracle Piano Teaching System, The Chessmaster 3000, The Software Toolworks' Star Wars Chess, Outlander, Orb-3D and The Chessmaster 4000 Turbo.

Before being a game developer he went to four Universities which are University of California, University of California, Los Angeles, University of California, Davis and California State University, Northridge.

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