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Command Master Chief Gruber was raised in Pittsburgh, Pennsylvania. He entered Naval service on January 19, 2000, attending recruit training in Great Lakes, Illinois. He next completed submarine school, auxiliary machinist mate ‘A’, and ‘C’ schools in Groton, Connecticut.
In 2000, he reported to his first boat USS Dallas (SSN 700) in Groton, Connecticut where he served as a member of auxiliary division and dry deck shelter (DDS) leading petty officer. During this tour, he made two Mediterranean deployments, and completed two selective restricted availabilities. During his tour the ship was awarded the Battle “E”.
In 2005, he served ashore Mid-Atlantic Regional Maintenance Center (MARMC) in Norfolk, Virginia where he served as the assistant leading petty officer and lead watertight door and hatch technician in the submarine repair department. During his tour, he trained Sailors in depot level maintenance and coordinated availabilities for 11 home ported submarines.
In 2008, he reported onboard USS Oklahoma City (SSN 723) in Norfolk, Virginia where he served as a member of auxiliary division and assistant quality assurance officer (AQAO). Shortly after reporting, he was selected to chief petty officer in 2008. During his tour, he made a Southern Command deployment and conducted change of homeport to Portsmouth, New Hampshire for engineering overhaul (EOH) availability. During his tour the ship was awarded the Battle “E”.
In 2009, he reported onboard USS San Francisco (SSN 711) in Bremerton, Washington where he served as the chief of auxiliary division and the 3M coordinator. During his tour, he completed a change of homeport to San Diego, California, made a West Pacific deployment, and a pre-inactivation restricted availability (PIRA).
In 2011, he served ashore performance monitoring team (PMT) and Submarine Squadron ELEVEN in San Diego, California where he served as the assistant officer in charge (AOIC) and the damage control assistant (DCA). During his tour, he served as acting command master chief (CMC), maintained waterfront auxiliary division readiness, and provided technical assistance for 6 home ported and visiting submarines.
In 2013, he served as chief of the boat (COB) onboard USS San Francisco (SSN 711) in San Diego, California where he served as the chief of the boat. During his tour, made two extended West Pacific deployments, he made a change of homeport to Norfolk, Virginia. During his tour the ship was awarded the Battle “E” two times within a three year period.
In 2017, he reported to ARCO (ARDM 5) in San Diego, California where he served as the command master chief. He was temporarily assigned as the chief of the boat (COB) onboard USS Alexandria (SSN 757) for six months in San Diego, California. During his tour, docked and undocked multiple submarines and led the Alexandria crew through multiple pre-deployment certifications.
In 2018, he reported to USS Frank Cable (AS 40) in Santa Rita, Guam where he serving as the command master chief for a crew over 900 officers, enlisted, and CIVMAR Sailors. During his tour the ship was awarded the Battle “E”.
In 2021, he reported to NTAG Pittsburgh in Pittsburgh, Pennsylvania where he currently serves as the command master chief.
Command Master Chief Gruber’s personal awards include the Meritorious Service Medal (one award), Navy and Marine Corps Commendation Medal (four awards), the Navy and Marine Corps Achievement Medal (seven awards), Good Conduct Medal (six awards), and various campaign awards. He graduated from the Senior Enlisted Academy (SEA) and the Command Master Chief/Chief of the Boat course in September 2013.