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United Nations Space Command
Tom Gerencer was a private in the UNSC Marine Corps.
In 2535, he was stationed at Camp Patmos on Chi Rho. He had gone on several patrols in the tent cities that Outer Colonies refugees had set up, and knew more than most how bad the situation with refugees was.
He drove Lieutenant Jacob Keyes from his landing site to Camp Patmos, where he would have a meeting with Vice Admiral Jean Mawikizi concerning Keyes' new position aboard the UNSC Midsummer Night. He had a notably cheerful disposition, even when he was clearly annoyed. His weapon of choice was the BR55 battle rifle.