Christian Kleiner studied architecture and, having qualified, completed a post-graduate course in Construction IT. He joined gmp in 1989 in the role of project supervisor; in 2000 he was appointed Senior Site Manager. Projects he has managed include the new Terminal 3 at Stuttgart Airport, the Armed Forces Engineers School in Ingolstadt, the Elbbrücken U4 underground station in Hamburg, and the extensions of TU Harburg and Messe Hanover.