John Eidsmoe is a Premiere  constitutional attorney, he has successfully litigated court cases involving First Amendment religious freedom and has defended home education and Christian schools, championed the right of students and teachers to study the Bible in public schools, debated ACLU attorneys on radio and television, and served on the Ten Commandments Legal Defense Team.  He holds five degrees in law, theology, and political science. These include two doctorates, one in law from the University of Iowa, and one in ministry from the Oral Roberts University. He earned his Masters of Divinity degree from Lutheran Brethern Seminary and his Master of Arts degree in biblical studies at Dallas Theological Seminary. His Bachelor of Arts degree in political science is from St. Olaf College. He is also a graduate of the Air Command & Staff College and the Air War College.

He has taught legal and church history at law schools and seminaries. He previously served as a professor of constitutional law and related subjects at the Thomas Goode Jones School of Law, Faulkner University, Montgomery, Alabama, where his students twice gave him the Outstanding Professor Award. He is also an Adjunct Professor at Birmingham Theological Seminary. A constitutional attorney and retired Lieutenant Colonel in the U.S. Air Force Reserve, Colonel Eidsmoe has also taught church history and other subjects in various seminaries. He currently teaches as an adjunct professor at Oak Brook College of Law and Handong International Law School.

He has authored over a dozen books, including Christianity & the Constitution, Columbus & Cortez, and the video series titled The Institute on the Constitution. His most recent work is a three volume set: Historical and Theological Foundations of Law.