A Roman Catholic teaching in a United Methodist seminary, Lee leads classes for adults at Catholic, Methodist, Presbyterian and Episcopal churches in the Dallas area. His books and research on the history of early Christianity offer insights that he believes can foster Christian unity today.

Lee also serves as director of the Doctor of Ministry program, a position he has held since 2018. The new curriculum, which was revised in 2017, is designed for full-time ministers who are seeking to develop leadership skills and to find new strategies for community building. “Our aim is to bridge the gap between the academy and the church,” Lee explained. “The Doctor of Ministry program enables our students to use the latest research in the fields of theology, adaptive leadership and social entrepreneurship in order to address practical problems in contemporary Christian ministry.”