Jonathan J. O'Neill



Jonathan J. O'Neill, also known as John or, most commonly, Jack, was a Human male who is a Lieutenant General, in the Starfleet Marine Corps, who served twenty years in the Stargate Program until he was transferred to the Homeworld Command building to become the head of Homeworld Command (also called Homeworld Security). He was the original leader of SG-1 and later became the commander of Stargate Command. In 2385 General O'Neill became the leader of SG-1 again.