AT: "xx" Michael Westmore (also known as Mike Westmore) was a Starfleet officer in the 24th century.
In the 2370s, he was listed as a Yard Engineer on the dedication plaques of the Defiant-class starships. (DS9: "The Die is Cast", dedication plaque; DS9: "Valiant", dedication plaque; DS9: "The Dogs of War", dedication plaque)
In 2371, he was listed as a Yard Engineer on the dedication plaque of the USS Voyager. (VOY: "Caretaker", dedication plaque)
In 2372, he was listed as a Propulsion Systems officer on the dedication plaque of the USS Enterprise-E. (Star Trek: First Contact, dedication plaque)
In 2374, he was listed as a Yard Engineer on the dedication plaque of the USS Prometheus. (VOY: "Message in a Bottle", dedication plaque)
In an unknown, alternate future timeframe, he was named as a Fleet Ops officer on the dedication plaque of the USS Pasteur. (TNG: "All Good Things..." dedication plaque)