SWITCH GEARS. The code name used by U.S. Army Sergeant Jerome T. Jivoin, born in Bogota, Columbia. Jivoin served the reinstated G.I. Joe team as armored vehicle driver and an intelligence field operative. He was known to disguise himself as a Cobra agent to gather intelligence on the enemy. Today, like many Joes, he is a reserve member of the team. Switch Gears was on of the many Joes who participated in the conflict known as World War III.