Christopher E. Gerty (born October 19, 1975) is an American aerospace engineer who worked on NASA's Constellation Program. Gerty is an advocate of NASA's Open Government Initiative and is a leading voice on the concept of participatory exploration and collaboration. He has fifteen years of experience working on complex, technology-intense projects at NASA. Gerty served as an aquanaut on the NASA Extreme Environment Mission Operations 13 (NEEMO 13) crew.