Dr. Jim Rosscup has taught classes on the Old Testament and the New Testament for over 50 years. He studied under J. Dwight Pentecost at Dallas Theological Seminary, where he received a Th.D. in Bible. He obtained a Ph.D in New Testament at King's College, University of Aberdeen, Scotland, under the supervision of I. Howard Marshall.

Throughout his educational career, Dr. Jim Rosscup received recognition for his writing skills, obtaining awards for journalism, feature writing, essays, and his Th.D. dissertation. Shortly after completing his Master of Theology program at Dallas Theological Seminary in 1961, he served on the staff of Campus Crusade for Christ for one year, with responsibilities for their Collegiate Challenge magazine. From 1965 to 1987 Dr. Jim Rosscup served as Chairman of the Department of Bible Exposition at Talbot Theological Seminary. He also worked as an adjunct faculty member for Grace Theological Seminary in its doctoral program.

As a prolific author, he has written a number of articles and books, among which are Abiding in Christ: Studies in John 15 and Commentaries for Biblical Expositors. Dr. Jim Rosscup joined the faculty of The Master's Seminary in 1987. He retired from full-time teaching in June 2005, but continued to teach a course or two each semester. He was active in his local church and had spoken often in conferences and church ministries throughout the Southwest United States. Dr. Rosscup went to be with the Lord in 2020.