Rear Adm. Mack is a native of Silver Spring, Maryland. He graduated from the University of New Mexico with a Bachelor of Science in Electrical Engineering under the Nuclear Enlisted Commissioning Program. He holds a Master's Degree in Electrical Engineering and a Post-Masters Certificate for Advanced Study in Signal Processing from Johns Hopkins.
His sea duty assignments include serving as a Division Officer onboard USS ALASKA (GOLD) for five strategic deterrent patrols, Navigator onboard USS MEMPHIS for two North Atlantic deployments, and Executive Officer onboard USS VIRGINIA for her maiden deployment. Following his Department Head tour on MEMPHIS, he was the first U.S. Submariner to attend and pass the U.K. Submarine Command Course – 'Perisher'. He commanded USS HAWAII (SSN 776) from January 2010 through March 2013. While in command, the ship completed two Western Pacific deployments and earned the Battle Efficiency 'E' for 2010 and 2012. He served as Commodore, Submarine Development Squadron Five and most recently as Chief of Staff to Commander Submarine Force, Atlantic.
His staff assignments include USINDOPACOM Director Current Operations Division (J33); COMSUBPAC Prospective Commanding Officer Instructor; Submarine Squadron One Deputy for Operations; Submarine Squadron Seven Deputy for Operations; Exchange Officer at the Submarine Headquarters at HMAS STIRLING, Western Australia; and Assistant Director for Officer Training at Naval Submarine School, Groton, CT.
His personal decorations include the Defense Superior Service Medal (two awards), Legion of Merit (four awards), Meritorious Service Medal (two awards), Navy and Marine Corps Commendation Medal (five awards), and Navy and Marine Corps Achievement Medal (four awards). He is most proud of the unit awards earned by the outstanding teams with which he has been privileged to serve.