조직신학, 성서신학, 사해문서, 나그 함마디 문서, Q 전공 Davidson College (B.A.) Columbia Theological Seminary (B.D.) University of Basel (Dr. Theol.) Princeton Theological Seminary (Ph.D.) Professor Emeritus of Religion (Claremont Graduate University, Claremont, California) 현재 International Q Project의 회장