A N.S.A. agent with extensive paramilitary training, Sirrot was the only survicor of the security task force from "Deep Freeze Project". Given his skills at infiltration and hand-to-hand combat, Sirrot was selected to be the team point-man. A very practical and cynical man, Sirrot constantly argued with Gunny over leadership and combat decisions, but eventually came to respect the aged veteran code of honor. Unfortunatly his double loyalties, to the unit and the N.S.A. caused him various problems over time.