We are seeking a part time PhD Intern researcher in theoretical and computational chemical physics to join the Chemical Physics Theory Group in the Physical and Computational Sciences Directorate at Pacific Northwest National Laboratory (PNNL). The research focuses on developing relativistic theoretical methods to model electron dynamics in hyperfine couplings, electric-field gradients, and L- or M-edge X-ray spectroscopies. This work combines relativistic electronic structure theory, many-body physics, and machine learning approaches. This theory position is based at Pacific Northwest National Laboratory (PNNL) in Richland, Washington and involves multi-institutional collaborations. What you will do:Develop relativistic theoretical methods and downfolding protocols for model systems and core spectroscopies. Conduct research and collaborate with team members in a multi-institution research team. Lead manuscript preparation and maintain a strong publication record in the peer-reviewed scientific literature. Present research at technical conferences and project or program review meetings. Communicate and collaborate with researchers across the multi-institution project team. Participate in the development of research proposals as needed Qualifications. Minimum Qualifications:Candidates must be currently enrolled/matriculated in a PhD program at an accredited college. Minimum GPA of 3.0 is required. Preferred Qualifications:Experience in ground- and excited-state relativistic electronic structure methods, and many-body physics. Experience with scientific programming and code development. Programming experience in Fortran, C , and/or Python. Experience with four component relativistic quantum chemistry methods. Strong written and verbal communication skills. Experience working in collaborative and interdisciplinary research environments