Helmholtz-Zentrum Dresden-Rossendorf (HZDR) is seeking a PhD Student to join the Institute of Resource Ecology in the Department of Reactive Transport for research on hydrogen isotopes. The focus of the position is on quantum-mechanical simulations of hydrogen isotope separation and transport using 2D layered materials, as well as density functional theory and nuclear quantum effects simulations. The ideal candidate should have a background in chemistry, physics, or material science with experience in quantum-mechanical simulations or experimental work with gas phases and membranes. Fluency in English and programming skills in Python are desirable. The selected candidate will be part of an interdisciplinary and multinational research environment, contributing to the diverse ¹²³H research community at HZDR. The institute offers a vibrant research community, professional networking opportunities, a structured PhD program with continuing education options, and benefits as per the collective agreement for the public sector. Applicants are encouraged to align with the core values of the Research Training Group 2721, emphasizing excellence in research and qualification, scientific integrity, and a passion for ¹²³H research. Strong communication skills, both written and verbal, are essential for effective collaboration. Additionally, the institute supports work-life balance through part-time employment options, mobile working, flexible hours, and various company health management offerings. Interested candidates can apply by submitting their application documents, including a cover letter, CV, and diplomas, through the online application system. This opportunity provides a platform for academic growth, professional development, and engagement in cutting-edge hydrogen isotopes research.