The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences within Switzerland. We perform cutting-edge research in the fields of future technologies, energy and climate, health innovation and fundamentals of nature. By performing fundamental and applied research, we work on sustainable solutions for major challenges facing society, science and economy. PSI is committed to the training of future generations. Therefore, about one quarter of our staff are post-docs, post-graduates or apprentices. Altogether, PSI employs 2300 people.
For many years the Laboratory for Waste Management (LES/PSI) has been conducting a multi-disciplinary research program on radionuclide retention and transport in the field of geological disposal of radioactive waste, using a unique combination of experimental infrastructure and modelling capabilities. Such studies have strong synergies with the field of environmental engineering and circular economy, including CCS and geo-thermal energy harvesting. Further, LES/PSI and the Laboratory of Soil Mechanics (LMS/EPFL) are fostering collaboration in the field of THMC-behaviour of clay systems. To better understand the chemo-mechanical coupling in clays we are looking for a
Your tasks
- Develop advanced constitutive models for chemo-mechanical coupling in clay systems and its extension to generic T-H-M-C numerical codes.
- Support the planning of experimental programs and interpretation of results from chemo-mechanical experiments conducted at LES/PSI, LMS/EPFL and underground research laboratories (e.g., Mont Terri URL).
- Apply developed models in geoengineering problems such as geological disposal of radioactive waste, CO2-sequestration and geo-energy.
- Collaborate with PSI and EPFL colleagues, and partners nationally and internationally, to deliver and publish the scientific outcomes of major research initiatives.
Your profile
- You are experienced in numerical modelling and simulation of coupled T-H-M-C processes in clay based engineered barrier systems.
- Experience with numerical algorithms (also open source) for 1D/3D simulations is expected.
- You have a strong interest in supporting, and collaborating on, the multiscale multi-physical experimental studies of chemo-mechanical coupling in clays systems conducted at EPFL and PSI.
- You can offer innovative thinking and a strong motivation to launch and lead multi-national collaborative projects. Excellent knowledge of English is required, and knowledge of German or French is beneficial.
- You have a PhD degree in a relevant discipline and at least 2 years of post-doctoral research experience or equivalent.
We offer
Our institution is based on an interdisciplinary, innovative and dynamic collaboration. You will profit from a systematic training on the job, in addition to personal development possibilities and our pronounced vocational training culture. If you wish to optimally combine work and family life or other personal interests, we are able to support you with our modern employment conditions and the on-site infrastructure.
This is a Tenure Track position. The employment contract will initially be limited to 3 years.
For further information, please contact Prof. Sergey Churakov (LES/PSI) , phone +41 56 310 4113 and Prof. Lyesse Laloui (LMS/EPFL), phone +41 21 693 23 14.
Please submit your application online by the 31st October 2025 (including list of publications and addresses of referees) (including addresses of referees) for the position as a/an Scientist (index no. 4404-01).
Paul Scherrer Institute, Human Resources Management, Adina Keller, 5232 Villigen PSI, Switzerland