Undersea career From 1977 to 1984, Gernhardt worked as a
professional diver and project
engineer on a variety of
subsea oil field construction and repair projects around the world. He then participated in the development and field implementation of a variety of new
decompression tables. From 1984 to 1988, Gernhardt worked as Manager, and then Vice President of Special Projects, for
Oceaneering International. During this time, he led the development of a telerobotic system for subsea platform cleaning and inspection, as well as a variety of new diver and robot tools. In 1988, he founded
Oceaneering Space Systems, a company formed to transfer subsea technology and operational experience to the ISS program. • Member of the astronaut support team at
Kennedy Space Center,
Florida, responsible for Shuttle prelaunch vehicle checkout, crew ingress/egress • Spacecraft communicator (CAPCOM) at
Mission Control Center,
Houston, during various Shuttle missions • Lead an international research team in developing a new exercise prebreathe protocol that improved the safety and efficiency of space walks from the ISS. Gernhardt presently serves as a member of the astronaut office EVA branch, as Principal Investigator of the Prebreathe Reduction Program, and as Manager of JSC's Environmental Physiology Laboratory. In April 2005, he was the commander of the
NEEMO 8 mission. Gernhardt drove the lunar rover prototype at President
Barack Obama's inaugural parade on January 20, 2009. On September 19, 2011,
NASA announced that Gernhardt would participate in the
NEEMO 15 mission in October 2011 from the
DeepWorker submersible. The DeepWorker is a small
submarine used as an underwater stand-in for the
Space Exploration Vehicle, which might someday be used to explore the surface of an
asteroid. In June 2012, Gernhardt piloted the DeepWorker as part of the
NEEMO 16 mission, for which he was principal investigator. ==Spaceflight experience==