Brian served in the U.S. Navy for 33 years. He commanded U.S. Naval Special Warfare Command, U.S. Special Operations Command Africa, Combined Joint Task Force-Horn of Africa, Naval Special Warfare Development Group, and SEAL Delivery Vehicle Team ONE. He worked alongside teammates in Task Forces deployed to the Middle East, Central Asia, the Balkans and Africa, and has significant operational experience in contingency operations around the world. He served as a Director for Combating Terrorism and Director for Maritime Security on the National Security Council Staff under the Bush and Obama Administrations.