- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Initial ranking officer of the Starfleet contingent besieged at Starbase AR-558 by Dominion forces. Loomis was killed in battle, and command was assumed first by Parker, and then Nadia Larkin.