The Time Resolved Research Group in the X-ray Science Division invites applications for a Postdoctoral Appointee position. The role focuses on enhancing time-resolved X-ray absorption (XAS) spectroscopy capabilities and is part of a collaborative project between the X-ray Science Division and the Chemical Sciences and Engineering Division. In this role, your primary responsibility will be to develop and enhance time-resolved total fluorescence detected XAS techniques and high-energy resolution fluorescence detected XAS techniques. You will apply ultrafast X-ray and laser spectroscopies to investigate electronic and structural evolutions during photochemical and photocatalytic reactions. **Position Requirements** Required knowledge, skills, and experience: + A PhD degree completed in the last 0-5 years in Physics, Chemistry, Materials Science, or related field + Experienced with time-resolved physical chemistry + Excellent oral and written communication skills + Ability to collaborate and work in an interdisciplinary research team setting + Ability to model Argonne’s core values of impact, safety, respect, integrity, and teamwork ​ Desired knowledge, skills, and experience: + Working experience with ultrafast lasers or experience with synchrotron X-ray experiments + Experience with instrumentation development **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._