We have multiple openings for Postdoctoral Researcher positions to conduct research in particle and heavy-ion physics within the Particle Physics Group. The group participates in the ATLAS and sPHENIX experiments, the Jetscape collaboration, and the forthcoming EIC. Its interests span both high-energy and relativistic heavy-ion physics and applicants with a background in either field are encouraged to apply. Physics topics include, but are not limited to: jet physics, ultra-peripheral heavy-ion collisions, and heavy-flavor physics including quarkonium and exotic hadronic states. The group is also involved in developing improvements to data reconstruction that utilize machine learning methods and/or exploit hardware acceleration features available in high-performance computing resources. Candidates will work with their group mentors to develop a program of research based on their individual interests and commensurate with these activities. This position is in the Particle Physics Group of the Nuclear and Chemical Sciences Division.