Applications are invited for post-doctoral positions in the Cosmological Physics and Advanced Computing Group (CPAC) Group in Argonne National Lab. Research at CPAC covers theory, modeling, observations, and experiments targeted at dark energy, dark matter, inflation, and neutrinos. Theory and modeling activities emphasize multi-wavelength survey science, the galaxy-halo connection, cluster cosmology, and simulations. Analysis efforts cover topics such as CMB power spectra, CMB lensing, galaxy clustering, redshift-space distortions, and weak and strong gravitational lensing. The observational focus is on optical sky surveys (DES, DESI, Roman, Rubin Obs/LSST, DESC, SPHEREx), CMB instrumentation and observations (CMB-S4, SPT), and cross-correlations. Applicants with research experience in any of the above areas will be considered. One of our open positions is to work with Andrew Hearin on forward modeling galaxy SEDs and the galaxy--halo connection with applications to DESI, LSST, and CMB cross-correlations. Another open position is to work with Matthew Becker on weak lensing analyses with Rubin LSST data. **Position Requirements** + A Ph.D. in physics, astronomy, or a related area completed within 5 years of experience or equivalent at the starting date is required + Ability to model Argonne’s Core Values: Impact, Safety, Respect, Integrity, and Teamwork Applicants should send: 1) CV 2) Brief statement of research interests 3) Arrange for three letters of recommendation to be sent to cosmojobs@anl.gov by December 15, 2024 **Job Family** Postdoctoral Family **Job Profile** Postdoctoral Appointee **Worker Type** Long-Term (Fixed Term) **Time Type** Full time _As an equal employment opportunity and affirmative action employer, and in accordance with our core values of impact, safety, respect, integrity and teamwork, Argonne National Laboratory is committed to a diverse and inclusive workplace that fosters collaborative scientific discovery and innovation. In support of this commitment, Argonne encourages minorities, women, veterans and individuals with disabilities to apply for employment. Argonne considers all qualified applicants for employment without regard to age, ancestry, citizenship status, color, disability, gender, gender identity, gender expression, genetic information, marital status, national origin, pregnancy, race, religion, sexual orientation, veteran status or any other characteristic protected by law._ _Argonne employees, and certain guest researchers and contractors, are subject to particular restrictions related to participation in Foreign Government Sponsored or Affiliated Activities, as defined and detailed in United States Department of Energy Order 486.1A. You will be asked to disclose any such participation in the application phase for review by Argonne's Legal Department._ _All Argonne offers of employment are contingent upon a background check that includes an assessment of criminal conviction history conducted on an individualized and case-by-case basis. Please be advised that Argonne positions require upon hire (or may require in the future) for the individual be to obtain a government access authorization that involves additional background check requirements. Failure to obtain or maintain such government access authorization could result in the withdrawal of a job offer or future termination of employment._