Scientific Programmer Weather and Climate Simulations – Open Position

80%-100%, Zurich, temporary

The Center for Climate Systems Modeling (C2SM) is one of ETH Zurich’s competence centers. It will become an extradepartmental centre of ETH starting 2021. C2SM is a joint venture between ETH Zurich, MeteoSwiss, Empa, WSL, and Agroscope. As part of the restructuring, we are increasing competencies and are hiring new staff. One central focus of C2SM consists of providing technical programming support for our climate modelling groups using the Icosahedral Nonhydrostatic Weather and Climate Model ICON, the COSMO regional weather and climate model, and others. C2SM supports both the traditional versions running on central processing units (CPUs), as well as the versions running on graphical processor units (GPUs).

Job description

C2SM is seeking to appoint a Scientific Programmer Weather and Climate Simulations to extend their activities around technical support and carrying out simulations with the COSMO and ICON models for C2SM groups and/or projects. In particular, she/he will:

  • Support short-term technical requests from the C2SM ICON community (running, compiling, and debugging code)
  • Maintain official ICON releases on local machines; provide and process ICON input files, assess the performance of the model, support groups with computing time proposals for the Swiss National Supercomputing Centre CSCS
  • Build ICON and COSMO-GPU model chains for high-resolution (HR) regional climate simulations, carry out simulations for C2SM groups and/or projects or support them therein, carry out technical and basic evaluations of the simulations
  • Foster the international contact with the CORDEX community
  • Prepare and conduct technical education courses for the group members of the C2SM community in collaboration with the other C2SM programmers
  • Prepare, conduct, and postprocess the annual working group meetings, in collaboration with the other C2SM programmers

Your profile

You have a PhD in Atmospheric Science, Physics, or a related field. You have relevant experience in processing weather and climate models, preferably with the COSMO or ICON model, and outstanding programming skills in Fortran in a Unix environment (other languages like Python etc. are a plus). Experience with GPU versions of weather and climate models is considered an advantage. To round off your profile, you are a goal-driven individual used to working independently, but you are also team- and service-oriented enjoying working in a diverse working environment and interested in providing support to students and scientists within a large community.


We offer an engaging position which provides the opportunity to provide services around atmospheric numerical simulations, to collaborate with internationally renowned research groups and supercomputing centres, and to be part of a motivated team. The position is available from January 2021 (or as soon as possible thereafter). This is a long-term position with an initial appointment for two years. Applications including a letter of interest, a CV, and the names and contact information of 2–3 references will be given full consideration. Applications are accepted until the position is filled. For further questions, please contact the executive director of C2SM, Dr. Christina Schnadt Poberaj at (no applications).

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