Doctor of Philosophy, University Bern, Switzerland, 1984. Dr habil, University Bern, Switzerland, 1991.
Wissenschaftlicher assistant University Bern, Switzerland, 1981—1987. Associate professor Union Theological Seminary Virginia, Richmond, Virginia, 1987—1989, professor, 1989—1992, chair biblical studies department, 1989—1992. Professor history and archaeology of early Christianity and its environment University Kiel, Germany, 1992—1999, director Institute New Testament and Judaic Studies Germany, 1992—1999, dean School Theology Germany, 1996—1998.
Professor New Testament studies University Heidelberg, Germany, since 1999. Director Phrygia archaeological surface survey University Heidelberg. Co-discoverer Discovery of Pepouza, since 2001.
Member of Society Biblical Literature, Societas Theologicum Ordinem Adiuvantium (founder, 1st chairman 1997-1999), Studiorum Novi Testamenti Societas.
Married Margaret Birdsong, August 10, 1984. Children: Daniel, Jessica.