He held the chair of Professor of Church History at Trinity Evangelical Divinity School in Deerfield, Illinois (1964–74).

A founding board of trustees collaborated with Montgomery to establish in 1980 the Simon Greenleaf School of Law.

Additionally, a one-and-a-half year post-graduate course in Christian Apologetics and International Human Rights was offered that led to the conferral of a Master of Arts degree.

Prior to earning that title, they placed second in the Western Regional Championship, held in January 2014 in Sacramento, California, which was the qualifier for the final in Wisconsin.

[14] It also publishes Trinity Law Review, a scholarly journal that is operated by invited students.

[15] Notable founding members of the faculty teaching in the defunct Master of Arts program included Harold Lindsell, Walter Martin, Josh McDowell, and Rod Rosenbladt.

The first dean of the law school during the transition from Simon Greenleaf University to Trinity International University was Shannon "Verleur" Spann (a 1990s graduate of Simon Greenleaf Law School), whose husband, Johnny Micheal Spann (a CIA paramilitary operations officer), was the first American killed in Afghanistan during Operation Enduring Freedom.

[16][17][18] Scott Lively, a conservative Christian pastor known for calling for criminalization of "the public advocacy of homosexuality" and his support of the Ugandan Anti-Homosexuality Bill, received a J.D.