Which role is responsible for ensuring that all jumpers are properly positioned before exit?

The role responsible for ensuring that all jumpers are properly positioned before exit is the Jumpmaster. This individual has the critical duty of supervising and conducting the jump operation, which includes verifying that each jumper is correctly seated and secured in the aircraft prior to the jump. The Jumpmaster conducts pre-jump briefings, checks equipment, and ensures that jumpers follow proper procedures for a safe exit from the aircraft. By managing the jumpers' positions and readiness, the Jumpmaster plays an essential role in maintaining safety and operational effectiveness during the jump sequence. This level of responsibility is crucial, as any misalignment or issue at this stage could lead to complications during the jump.

Other roles mentioned, such as the Flight Engineer, Crew Chief, and Parachute Rigger, contribute to the overall safety and functionality of the jump operation but do not have the specific responsibility for jumpers' positioning just before exit.