R. Matthew Croslin is a retired Lieutenant Colonel with a focus as a petroleum officer. He spent 31 years in the United States Army in all three components. He began his military career by enlisting in the Oklahoma Army National Guard and later getting commissioned as a 2nd Lieutenant, transferred to the US Army Reserve, and then spent the next 23 years on active duty ending his career at Fort Leavenworth, KS and the US Army Command and General Staff College as a staff instructor and team leader. He has a bachelor’s degree from the University of Oklahoma and a Master’s degree in Management from Webster’s University.