Bobby Liddell began his work with MSOP, as Dean of Admissions and instructor, in 1994. In 2002, he became Associate Director. He began directing the annual MSOP Lectures, and editing the Lectureship book(s) in 2003.

A native of Birmingham, Alabama, he is married to Joan (Loe), and they have three children: Tony, Nathan, and Keri, and three grandchildren, Ethan, Abbey, and Mia. While dating Joan, who was a member of the church at Adamsville, Alabama, he was encouraged by her godly living to obey the Gospel. They were married in 1972, and attended the Adamsville congregation, where Bobby preached his first sermon January 1, 1978.

Brother Liddell received his earlier education at Walker College and the University of Alabama in Birmingham. In 1977, he entered Memphis School of Preaching, and received the Outstanding Student Award upon graduation in 1979. He graduated with a Bachelor of Arts Degree as valedictorian (Summa Cum Laude) from Southern Christian University in 1985, and received his Masters of Arts Degree in 1986. He has continued his education beyond the MA Degree. In 1997, he was awarded the Alumnus Of The Year award from the MSOP Alumni Association.

The Liddells have been involved in local work since 1979, working with congregations in Alabama, Florida, and Tennessee, and currently work with the Solo Church of Christ, Covington, Tennessee. Bobby has been associated with several publications, having been Associate Editor of The Christian Sentinel (which went monthly into 15,000 homes), Editor of Defender, and having served as a staff member of other brotherhood publications. He has written articles for various papers and bulletins, numerous chapters for Bible study books and lectureship books, and has produced materials for Bible class use (unpublished). While at the Bellview congregation, in Pensacola, Florida, he directed the annual Bellview Lectures, and edited six lectureship books (1989-1994).

Liddell has experience in both radio and television preaching, and preached on a daily thirty minute radio program while at Parrish, Alabama. He has been involved in Christian youth camp work, especially at Indian Creek Youth Camp, where he served as teacher and counselor for more than fifteen years, and also was selected to serve on the Board of Directors. He speaks in numerous Gospel meetings and lectureships yearly, and has made overseas preaching trips to Singapore, the Philippines, and Latvia. His teaching at MSOP includes numerous courses in both Old and New Testament books, Bible Geography, Church History, Old Testament Survey, Hebrew History, Homiletics, Topical Preaching, and Expository Preaching.