Astronaut, flew on Gemini 9, Apollo 10, and Apollo 17.
Last man on the moon, with the possibly apocryphal quote "Let's get this mother outta here!"
Left NASA to work for Coral Petroleum, specifically to "enhance Coral's energy related programs on a worldwide basis".
In 1981, left Coral to form his own company, "The Cernan Corporation", "to pursue management and consultant interests in the energy, aerospace, and other related industries".
Since then, Gene has become Chairman of the Board of Johnson Engineering Corporation, which is an outsource agent for various NASA functions.