Wilhelm (Willi) Haller (*25. Juli 1935; ¿ 2. August 2004) was not a theologian but an industrialist. Within the framework of his commitment to the Fellowship of Reconciliation, he also lectured on theological topics. He is mainly known for his contribution to the humanization of work but he was much concerned with philosophical and religious issues. He was very much influenced by the teachings of the bible scholar and Messianist Hugh J. Schonfield and convinced that a Servant Nation was the only way to solve the fundamental problems of mankind. He not only founded the leading flexible working hours and security equipment company, Interflex, but also was instrumental in innovative social projects. An unbelievable entrepreneur (most of his initiatives are still operating today), he was a gentle approachable person and father of four children.