A World War II pilot, he became a Christian after the war. He served as a missionary in Rwanda, Africa, and pastored numerous churches in North America including the Loma Linda University Campus Hill Church in Southern California. He also served as a revivalist and "pastor's pastor" in Canada. A powerful, Spirit-filled preacher, he retired in 1985 but continued speaking until his death in July, 2001. Pastor Lehman is now sleeping in Jesus, awaiting the resurrection.