After high school, Congressman Davidson enlisted in the Army as an infantryman. As part of the 3rd Infantry Division, he was stationed in Germany and witnessed the fall of the Berlin Wall. Warren's commanding officers recognized his potential and helped him earn an appointment to the United States Military Academy at West Point. He graduated near the top of his class as a student of American history and mechanical engineering. As an officer, he led in The Old Guard, the 75th Ranger Regiment, and the 101st Airborne Division.

After the Army, Congressman Davidson returned home, worked with his father, earned an MBA from the University of Notre Dame, and spent fifteen years owning and operating manufacturing companies in Ohio. In 2016, he again responded to the call of service, and came to work in the U.S. House of Representatives.

Warren and his wife Lisa have been married for over 25 years and have two adult children.