SGT. LIFELINE worked as a paramedic in New York City and quickly developed a reputation as the coolest head in the most extreme situations. Looking for a different kind of combat, he joined the military as a medic, where he was always ten steps ahead when it came to planning and executing rescue ops. His talents caught the eye of the G.I. Joe team, and when he saw that these guys go where the toughest battles are fought against the meanest enemies, he jumped at the chance of being a lifeline for others in the front line.