The Columbia Astrophysics Laboratory (CAL) invites applications for a Postdoctoral Research Scientist (PdRS) to perform laboratory studies of dissociative recombination for key molecular ions that are used to probe the properties of diffuse clouds in the interstellar medium.  The experiments will be performed on the Cryogenic Storage Ring (CSR), which is located at the Max Planck Institute for Nuclear Physics (MPIK) in Heidelberg, Germany.  The successful candidate will based in Heidelberg, Germany, and will provide the day-to-day leadership for the CAL-MPIK collaboration, headed by Dr. Daniel Wolf Savin at CAL and Dr. Oldrich Novotný at MPIK. The appointment is initially for one year, with the possibility of renewal for up to two additional years; this is contingent upon the ava