Mark is a retired aviation executive, college professor, and military pilot. The ideas for his books spring from life experiences, his extensive international travel, and an admiration for the unique "quiet" spyplanes from the Vietnam War. Mark served in leadership positions with the U.S. Marine Corps, the U.S. Border Patrol, and the U.S. Air Force before leading and managing aviation activities and aircraft operations for international corporations in the Washington, D.C. area. He holds a Master's degree in National Security and Strategic Studies from the Naval War College and an MBA from Embry-Riddle Aeronautical University. His novels have been approved by the CIA's Publication Review Board.