A native of Boston, Rear Adm. Daniel MacDonnell was commissioned an ensign in January 1987 after completing Aviation Officers Candidate School at Naval Air Station Pensacola, Florida. In 1990, he was re-designated as a special duty officer, cryptology (now information warfare).
MacDonnell's first flag assignment was as reserve deputy commander, U.S. 10th Fleet. His active duty assignments include a one-year mobilization with the International Assistance Force (ISAF) Joint Command in Kabul, Afghanistan; U.S. 10th Fleet, Fort Meade, Maryland; the Department of Defense, Fort Meade, Maryland; Naval Network Warfare Command, Norfolk; Navy Information Operations Command (NIOC) Georgia, Fort Gordon, Georgia; the Center for Expeditionary Counterterrorism Operations, Groton, Connecticut; the Naval War College, Newport, Rhode Island; USS John F. Kennedy (CV 67); Commander-in-Chief, U.S. Pacific Fleet, Pearl Harbor; and Naval Security Group Activity Edzell, Scotland.
His Reserve command tours include: commanding officer, Navy Reserve U.S. 10th Fleet; commanding officer, Navy Reserve (NR) NIOC Georgia; commanding officer, NR NIOC MD-Fort Devens, Massachusetts; and commanding officer Naval Security Group Reserve Devens, Massachusetts.
MacDonnell holds a master’s degree in management from Salve Regina University and a bachelor’s degree in electrical engineering, with a minor in psychology from Norwich University. He is an Advanced Joint Professional Military Education graduate of the National Defense University-Joint Forces Staff College, Norfolk, and a Joint Professional Military Education I graduate of the Naval War College-College of Command and Staff, Newport, Rhode Island. He has attended the National Defense University, Washington, D.C., and the Army Staff College, Fort Leavenworth, Kansas, and has completed the National Security Agency Senior Cryptologic Officer course.
MacDonnell is a chief information security officer with an international medical device company in Marlborough, Massachusetts. He is responsible for the organization's information security posture, setting the company's forward strategy for cyber security, and the evolution of its cyber defenses. He has previously led multiple technical support, quality assurance and professional services organizations at the director and vice president levels in the network, network security, and data storage business sectors.
MacDonnell assumed command of Information Dominance Corps Reserve Command in November 2014. He has additional duty as reserve deputy commander, Navy Information Dominance Forces.
MacDonnell’s personal decorations include the Legion of Merit, Defense Meritorious Service Medal, Meritorious Service Medal (three awards), Joint Service Commendation Medal, Navy and Marine Corps Commendation Medal (three awards), Navy and Marine Corps Achievement Medal (two awards), as well as the Afghanistan Campaign Medal, the NATO Medal and other unit and campaign medals and ribbons.