T. Snowdon

From Memory Alpha, the free Star Trek reference

T. Snowdon was a Starfleet officer who served under Captain Leyton aboard the USS Okinawa during the 2360s, when Benjamin Sisko was the ship's executive officer.

In 2372, Leyton, now an admiral, reassigned Snowdon to Starfleet Dental as part of his preparations to launch a military coup. (DS9: "Paradise Lost")