JD O’Brien serves as an Assistant Athletic Performance Coach. O’Brien works with the Indiana University Softball, Men’s Tennis, Men’s Golf and Cheerleading Team. He also serves as an assistant to Clif Marshall, Director of Athletic Performance for Indiana University Men’s Basketball. During his tenure, he has also worked with Indiana University Football team.

Prior to his arrival in Bloomington, O’Brien served as an assistant speed, strength and conditioning coach at Athletic Revolution of Northeast Indianapolis from May 2013 until May 2016. At Athletic Revolution O’Brien developed performance programs for local collegiate, high school and youth athletes.

O’Brien earned a bachelor's degree in sports performance from Marian University of Indianapolis. He is a certified USA Weight Lifting Club Coach and a member of the National Strength and Conditioning Association.