The Exobiology Branch (Code SSX) at NASA Ames Research Center is currently seeking interested applicants for the position of Research Space Scientist. The incumbent is responsible for conducting microbiological and/or geologic research to identify biosignatures that characterize past/present life in environments related to astrobiology. He/she studies the origin, composition, structure, and evolution of the solar system, including planets and satellites; the Earth and Moon; and meteorites, asteroids, comets and dust.