Jerome-092 was born on the inner colony world of Minister in 2511. He was conscripted into the Spartan-II program in 2517, and in 2525 received his augmentations like the rest of the Spartan-IIs. Jerome was one of a number of Spartan-II candidates that washed out from the program after his body failed to take the augmentations successfully. Some time after 2525, he, along with several other Spartan-II washouts including Douglas-042 and Alice-130, were successfully re-augmented, and formed into Red Team, with Jerome as the leader.
In 2531, Jerome and Red Team become involved in the Battle for Arcadia, and during the battle joined with the UNSC Spirit of Fire. During the battle, professor Ellen Anders was kidnapped by the Covenant, and the Spirit of Fire along with Red Team followed her and became embroiled in the Battle of the Etran Harborage. Jerome-092 and Red Team were instrumental in winning this battle, thought the Spirit of Fire was left adrift without a slipspace drive for the next twenty-eight years, with the crew placing themselves in stasis during that period.
In 2559, Jerome-092 and all of the Spirit of Fire found themselves over Installation 00, also known as the Ark. During investigation, Red Team came across the leader of the Banished Atriox, who initially defeated all three in battle, including causing serious injury to Douglas-042. Later in that battle, Jerome successfully infiltrated the Enduring Conviction, and with the help of UNSC AI Isabel, activated the ship’s glassing beam and instigated the Ark’s sentinels into attacking and destroying the Enduring Conviction.