[4][5] Copeman graduated from high school in Honolulu, Hawaii, after which he attended Creighton University, Omaha, Nebraska, where he received a Bachelor of Science degree in biology in 1981.
He holds a Master of Science in Administration degree from Central Michigan University and also completed the Massachusetts Institute of Technology Seminar XXI program on National Security Affairs.
His second division officer tour was as a gas turbine inspector for Pacific Fleet Propulsion Examining Board.
While ashore, Copeman served in the U.S. Strategic Command, Omaha, Nebraska, as an action officer in the Current Operations Directorate (J31).
He then served as commander, Joint Task Force, Guantanamo Bay, Cuba, followed by a period as chief of legislative affairs.