 She was the lead biomedical engineer for the Apollo 11 mission and was the only woman to help Neil Armstrong in the suit lab before launch.Sullivan was in the control room for the 1969 launch, keeping track of the biomedical systems; while she could not see the launch, Sullivan commented on the event "My seat rumbled and you knew something powerful was going on".As a biomedical engineer, Sullivan was responsible for maintaining the medical telemetry devices worn by the astronauts, and monitoring the telemetry from those instruments prior to and during the launch process.