USS Pioneer
From Star Trek: Theurgy Wiki
The USS Pioneer was an Intrepid-class starship operated by Starfleet in the late 24th century. The vessel saw heavy combat during the Dominion War, suffering a high casualty rate throughout the conflict, but the Pioneer survived to continue service after the armistice.
Alistair Leavitt served aboard the Pioneer as an Operations officer from 2374 until 2377.