The command master chief of a Hawaii-based submarine was fired last week.

Master Chief Machinist’s Mate (Auxiliary) Mark Szymanski was relieved from his post in the command triad on board the fast attack submarine Jefferson City on June 5 “due to personal misconduct identified in an investigation,” according to Cmdr. Cynthia Fields, a spokeswoman for Submarine Force Pacific.

“The Navy takes all reports of alleged misconduct seriously,” she added in an email.

Fields provided no other information concerning Szymanski’s relief and did not respond to questions about possible future disciplinary action.

She also did not respond to a request for the command investigation that allegedly sparked the master chief’s termination.

On a submarine, his former position is known as the chief of the boat.

Master Chief Sonar Technician (Submarine) Daryl Green has been named the new chief of the boat, according to Field, and Szymanski has been reassigned to Naval Submarine Support Command.

Szymanski did not respond to requests for comment.

A Minnesota native who enlisted in 2000, Szymanski pinned on master chief in August.

Before reporting to the Jefferson City in 2017, his career included stints on the submarines Olympia, Hampton and Portsmouth, according to his service records.