Postdoctoral Researcher / Postdoctoral Researcher

Postdoctoral Researcher: Hydraulic Stimulation and Proppant Behaviour in Crystalline Rock

100%, Zurich, fixed-term

The Chair of Engineering Geology and the BedrettoLab at ETH Zurich invite applications for a Postdoctoral Researcher position within the European research project UPLIFT, focusing on environmentally friendly hydraulic stimulation technologies in crystalline rock formations. The position is based at ETH Zurich and involves experimental research at the Bedretto Underground Laboratory. Hydraulic stimulation is a key technology for enhancing permeability in geothermal reservoirs. While multi-stage stimulation using proppants and chemical additives is widely applied in the oil and gas industry, its acceptance in Europe remains limited due to environmental concerns. Water-only stimulation approaches are more commonly accepted; however, their effectiveness compared to proppant-based methods, especially in crystalline rock, remains insufficiently understood. The Bedretto Underground Laboratory provides a unique, highly instrumented environment to investigate coupled seismo-hydro-thermo-mechanical processes during hydraulic stimulation. Within the UPLIFT project, controlled laboratory and field-scale experiments will be conducted to evaluate water-only, proppant-based, and chemically assisted stimulation techniques. The goal is to develop safe, efficient, and environmentally acceptable stimulation strategies for geothermal applications across Europe.

Job Description

• Plan, conduct, and analyze hydraulic stimulation experiments including proppant in vertical and horizontal boreholes (30-120 m scale) to investigate proppant transport, placement efficiency, and interaction with natural fracture networks.
• Assess the effectiveness of different stimulation strategies and proppant placement approaches under varying geological conditions in terms of permeability enhancement and fracture geometry.
• Collaborate with project partners performing small-scale laboratory experiments (GFZ) to provide joint interpretations and recommendations for the design of full-scale hydraulic stimulation operations (e.g., Litoměřice site and other European contexts).
• Contribute to project deliverables and reporting, publish results in peer-reviewed journals, and present findings at international conferences.
• Collaborate closely with project UPLIFT partners (GFZ, various industry partners) and support coordination between experimental, modelling, and field activities.

Profile

• PhD in Engineering Geology, Geophysics, Geomechanics, Earth Sciences, Physics, Engineering, or a related field.
• Strong background in rock mechanics, hydrogeology, or reservoir engineering.
• Experience with laboratory experiments and/or fieldwork in subsurface environments.
• Willingness to participate in underground field campaigns.
• Skills in numerical modelling (e.g., fracture mechanics, fluid flow).
• Strong programming skills (e.g., Python, MATLAB, or similar).
• Experience with seismic or fibre-optic sensing data is an asset.
• Ability to work independently and lead research tasks within a collaborative environment.
• Excellent communication skills in English.

Workplace

The postdoctoral researcher will be hosted at the Chair of Engineering Geology at ETH Zurich and collaborate closely with the BedrettoLab Team and the Swiss Seismological Service. She/he will work within a multidisciplinary consortium involving academic and industrial partners across Europe. The position offers close interaction with experts in geophysics, geomechanics, and geothermal energy.

We Offer

• A fully funded postdoctoral position (initially 2 years, with possible extension).
• Employment according to ETH Zurich regulations.
• Access to unique underground research infrastructure at BedrettoLab.
• A dynamic, interdisciplinary, and international research environment with strong links to academia and industry.
• Opportunities to lead publications and develop an independent research profile.
• Participation in international collaborations within a major European project.

We Value Diversity and Sustainability

In line with our values, ETH Zurich encourages an inclusive culture. We promote equality of opportunity, value diversity, and nurture a working and learning environment in which the rights and dignity of all our staff and students are respected. Visit our Equal Opportunities and Diversity website to find out how we ensure a fair and open environment that allows everyone to grow and flourish. Sustainability is a core value for us - we are consistently working towards a climate-neutral future.

Curious? So Are We.

Preferred start date: August 2026

We look forward to receiving your online application until the end of May 2026 with the following documents:

• Motivation letter
• CV
• List of publications
• Contact details of 2-3 references

Further information about BedrettoLab can be found on our website. Questions regarding the position should be directed to Dr. Valentin Gischig (valentin.gischig@eaps.ethz.ch).

Apply online using the form below.

Please note that only applications matching the job profile will be considered.

About ETH Zürich

ETH Zurich is one of the world’s leading universities specializing in science and technology. We are renowned for our excellent education, cutting-edge fundamental research, and direct transfer of new knowledge into society. Over 30,000 people from more than 120 countries find our university to be a place that promotes independent thinking and an environment that inspires excellence. Located in the heart of Europe, yet forging connections all over the world, we work together to develop solutions for the global challenges of today and tomorrow.