Capt. DeMarco, U.S. Navy, was commissioned through NROTC at The Citadel in 2000. His operational assignments include USS Cormorant (MHC-57), Explosive Ordnance Disposal Mobile Unit Four, Naval Special Clearance Team One, EOD Mobile Unit One, Combined Joint Special Operations Task Force – Arabian Peninsula, XO EOD Mobile Unit One, CO EOD Mobile Unit Eight and Commander Task Group 68.3/Sixth Fleet MCM Detachment Rota, Spain. His shore assignments include flag aide to commander, Naval Mine and Anti-Submarine Warfare Command, aide-de-camp to Commandant of the Marine Corps and branch chief, J34, U.S Africa Command. He is a graduate of Naval Postgraduate School in homeland security and defense.