The Theoretical High-Energy Astrophysics (THEA) group at Columbia University invites applications for the THEA Postdoctoral Fellowship. The initial appointment in the rank of a Postdoctoral Research Scientist will be for one year, with anticipated renewal for up to three years. The successful candidates will conduct independent and collaborative research under the guidance of professors Andrei Beloborodov, Zoltan Haiman, Yuri Levin, Brian Metzger and Lorenzo Sironi. More information on THEA can be found at https://thea.astro.columbia.edu . THEA Fellows have access to high-performance computational facilities and travel funds. Up to a few positions will be available, with specific research topics depending on the interests of the selected candidate(s) and proposed faculty mentors. The expected start date is on, or around September 1, 2024. The salary of the finalist selected for this role will be set based on a variety of factors, including but not limited to departmental budgets, qualifications, experience, education, licenses, specialty, and training. The above hiring range represents the University’s good faith and reasonable estimate of the range of possible compensation at the time of posting. Candidates must hold a PhD in Physics or Astronomy by the date of the appointment. Applicants should submit a Curriculum Vitae with the list of publications, a research statement that does not exceed 3 pages, and arrange for three reference letters sent directly by the writers. All application materials should be sent to HE.postdoc.columbia@gmail.com by November 6, 2023, though late applications may be considered until the position is full. Candidates interested in the physics of neutron stars and black holes are also encouraged to apply to the postdoc positions of the Simons Collaboration on Extreme Electrodynamics of Compact Sources (SCEECS), and select their preference for Columbia as host institution: https://www.simonsceecs.com/open-position Columbia is an Equal Opportunity Employer/Disability/Veteran Employer. Applications from women, minorities, and other underrepresented groups are strongly encouraged.