Prior to that, he had taught for 20 years at Trinity Evangelical Divinity School, where he was chairman of the department of biblical and systematic theology.

[5] On July 28, 2016, Grudem published an opinion piece on Townhall called "Why Voting for Donald Trump Is a Morally Good Choice".

He is the author of multiple books, including Systematic Theology: An Introduction to Biblical Doctrine, which advocates a Calvinistic soteriology, the inspiration and inerrancy of the Bible, believer’s baptism, a plural-elder form of church government, Old Earth creationism, and the complementarian view of gender relationships.

[12] Grudem and Bruce A. Ware were at the center of Trinitarian debate in 2016 that began online[13] and culminated in print publications.

[citation needed] In 1985, Grudem authored a study of over 2000 ancient Greek references to: κεφαλή, romanized: kephale, lit.

[19] All of Grudem's research on gender-related issues is now contained in his major 2012 reference work, Evangelical Feminism and Biblical Truth: An Analysis of More Than One Hundred Disputed Questions.