Served
- Calvin Theol. Seminary (2011-2012)
- Calvin Theol. Seminary (2000-2001)
- Calvin Theol. Seminary (1989-2000)
- Bd. of World Ministries (1986-1989)
- Westminster Theol. Seminary (1982-1986)
- Burton Heights (1978-1982)
- Bd. of World Missions (1972-1978)
- Leave (1970-1972)
- Mexico (1963-1970)
- Ceylon (Sri Lanka) (1958-1963)