One or more postdoctoral positions are available for research projects on the origin, residence times and geochemical signatures of deep crustal fluids and the subsurface microbial communities that are sustained by water-rock reactions in the deep Earth. Field, laboratory and modeling opportunities are available to extend the existing program to explore the implications of our work on Earth analogs to the search for life on the rocky bodies and ocean worlds of our solar system. Applicants with a PhD in geochemistry, geobiology, chemistry or related disciplines are encouraged to apply. Contact: Dr. B. Sherwood Lollar, firstname.lastname@example.org. Position is open immediately and will remain open until the position(s) are filled.