2011-Present: Ordinary Professor of Systematic Theology, The Catholic University of America
2010 or 2011: received into the Catholic Church
2006-2015: Executive Director, Center for Catholic and Evangelical Theology
2003-2011: Professor of Systematic Theology (also Dean and Vice President for Academic Affairs, 2003-9), Lutheran Theological Southern Seminary, Columbia, SC
1998-2003: Edward C. Fendt Professor of Systematic Theology, Trinity Lutheran Seminary, Columbus, Ohio
1988-1998: Research Professor; Director (1991-93; 1995-97), Institute for Ecumenical Research, Strasbourg, France
1980-1988: Assistant (1980-84) and Associate (1984-88) Professor of Systematic Theology, Lutheran Theological Southern Seminary
1978-80: Instructor in Religion, Davidson College, Davidson, North Carolina
1979: Ph.D., in Religious Studies – Theology; Yale University
1977: M.Phil., Yale University
1974: M.A., Yale University
1973: A.B., Dartmouth College (Summa Cum Laude, Salutatorian)
Editorial board, Brazos Theological Commentary on the Bible, 2003-present
Associate Editor, Pro Ecclesia, 2006-Present
Editorial Advisory Board, Ecclesiology, 2006-2015
Board of Directors, Center for Catholic and Evangelical Theology, 2016-present
Academy of Catholic Theology (Board member), 2017–2019
Ecumenical dialogues:
Member, USA Lutheran-Catholic Dialogue, 1998-2010, 2013-present
Member, International Lutheran-Catholic Dialogue, 2008-2010
Drafting committee for Lutheran-Episcopal full communion agreement, Called to Common Mission, 1997-99
Drafting committee to revise Lutheran-Roman Catholic Joint Declaration on the Doctrine of Justification; 1995-96.
Member, Anglican-Lutheran International Joint Working Group, 1999-2002
Faith and Order Commission Observer, Anglican-Roman Catholic International Commission (ARCIC II), 1995-1998
Ecumenical member, Inter-Anglican Theological and Doctrinal Commission, 1994-1996
Consultant, Anglican-Lutheran International Commission, 1988-1996
Member, Lutheran-United Methodist Dialogue, 1984-1987