Postdoctoral Researcher in Exoplanet Atmospheres / Postdoctoral Researcheress in Exoplanet Atmospheres

Postdoctoral Fellow in Space Research and Planetary Sciences

The University of Bern (UniBE) is a prestigious institution with a global reputation, offering an excellent platform for academic growth and research collaboration.

Start Date

Expected start date: 01.12.2026, or by arrangement.

Employment Relationship

Fixed-term position.

About the Project

We are seeking a fully-funded Postdoctoral Fellow to join the University of Bern's research team focusing on the atmospheres of transiting sub-Neptunes. The successful candidate will contribute to the SNSF-funded "Exo-Neptune Census," a project led by Assistant Professor Hugh Osborn, aimed at performing a population-level analysis of sub-Neptune radii, masses, and atmospheres. This research aims to deepen our understanding of the formation, composition, and evolution of these fascinating planetary bodies.

The Postdoc will primarily work on extracting atmospheric volatile abundances and bulk planetary volatile compositions from JWST observations of sub-Neptunes. The Exo-Neptune Census, funded for five years, involves PhD students engaged in detecting new Neptune-like exoplanets in photometric time series and characterizing them using various space- and ground-based facilities, including CHEOPS, HARPS, HARPS-N, and ESPRESSO. The group is enriched by the expertise of PD Dr. Daniel Kitzmann and Prof. Brice-Olivier Demory on atmospheric observations and retrievals, as well as Professors Yann Alibert and Christoph Mordasini who specialize in theoretical modeling of interior structures and planetary evolution. The successful Postdoc will have the opportunity to collaborate closely with these esteemed groups.

Your Profile

The ideal candidate will possess:

• Expertise in applying Bayesian statistical methods to astronomical datasets.
• Experience in modeling exoplanetary transits.
• A deep understanding of atmospheric physics (including chemistry and radiative transfer).
• A proven track record as an independent researcher.
• Proficiency in extracting spectra from JWST time series data and retrieving abundances.
• Additional theoretical expertise in linking sub-Neptune interiors with atmospheres.

The fellow will be expected to contribute to the project goals, while also enjoying ample protected time for independent research. The position includes generous travel support for attending international conferences and research visits. Teaching assistance at the University of Bern is expected, along with opportunities to supervise Master's projects and mentor PhD students.

What We Offer

The Physics Institute at Bern hosts multiple groups researching exoplanets (including atmospheres, interiors, and formation) alongside solar system astronomy (including planetary imaging and remote sensing), fostering a welcoming and egalitarian research environment. The University of Bern ranks among the top 200 global universities and is located in an international city consistently recognized as one of the top 10 most livable places worldwide. Postdoctoral salaries are competitive internationally, with the position funded for two years and a potential one-year extension. We encourage applications from candidates representing diverse and minority groups and those on non-linear career paths.

In addition, we offer:

• International reputation
• Team-oriented work environment
• Central location in the heart of Bern
• University sports programs

Working at the University of Bern

The University of Bern not only provides exciting tasks but also an environment dedicated to promoting development, diversity, and equal opportunities. Discover what makes us a unique employer and explore how you can grow with us.

Application Process

Apply online using the form below. Please note that only applications that match the job profile will be considered.

Contact for Queries

If you have any questions regarding the position, please reach out to:

Prof. Dr. Hugh Osborn
Email: hugh.osborn@unibe.ch