Seaborg Technologies is a start-up on the forefront of advanced and innovative nuclear reactor technology working to provide abundant, affordable and sustainable energy to the world. We have grown to become the leading molten salt reactor start-up outside of North America with an international team of 20 employees from four continents. We are actively developing the design for our Compact Molten Salt Reactor, alongside licensing and experimental validation activities of key safety and performance claims, and are currently planning a multi-million salt lab to accelerate these efforts. We are engaged with multiple stakeholders in the growing advanced reactor supply chain, primarily in East Asia.


Our success is entirely due to our brilliant and passionate team of employees and experienced advisers - a team we are currently in the process of expanding with more world-class talent determined to create positive change in the world.


We are hiring a materials scientist to play a central role in establishing and growing our laboratory team. The successful candidate will hold a senior position in our chemistry group, and will be performing both theoretical and experimental investigations of the development, performance testing and qualification of materials for use in molten salt reactors at high temperatures and under irradiation. Key words include metallurgy, materials selection, performance testing, microstructural characterisation, corrosion testing, coatings, irradiated materials testing, computational models development, and system design. As a member of the reactor research and development team, the position will include collaboration with the reactor physics and engineering groups in Seaborg to ensure due consideration of important physical phenomena and safety considerations across all relevant disciplines. Some international travelling should be expected.


Seaborg employees must be able to act proactively and independently to perform a wide variety of functions that do not always correlate with experience or expertise (such as writing job advertisements). That being said, the advertised position is expected to include at least some of the following responsibilities and tasks:

  • Plan, organise and execute experimental campaigns to establish and validate materials performance at high temperatures and in contact with molten salts;

  • Develop and design equipment for performance testing of materials;

  • Pursue compliance with regulatory requirements, including working to establish suitable standards and codes for the classification of salt-bearing systems, structures and components;

  • Procure and/or produce material samples for performance testing;

  • Carry out a wide range of measurements, including but not limited to: corrosion testing, structural integrity testing at high temperatures,  characterisation of material surface (before and after exposure to molten salts), microstructural characterisation;

  • Analyse and leverage experimental data to develop and validate computational structural material models to be used in safety assessment studies;

  • Analyse experimental and computational data to advise materials selection in the reactor system, including materials for the primary and secondary circuitry, pumps, heat exchangers, drain tanks, reactor core, gas supply and treatment systems, etc.;

  • Support planning of research and development activities to progress design, including scheduling, costing and establishing decision criteria;

  • Support the development of robust instrumentation and control systems for monitoring and controlling the chemistry, temperature and flow of molten salts, as well as for safeguards purposes;

  • Support IP development and acquisition activities.


  • Desire to positively change the world by shaping the energy landscape of tomorrow;

  • Demonstrated ability to creatively and diligently approach and solve challenging tasks within time and budgetary constraints;

  • MSc or higher in materials science, metallurgy, chemistry, chemical engineering, nuclear engineering, or similar;

  • PhD preferred;

  • Considerable experience with materials for molten salts, high-temperature fluids or other extreme environments;

  • Experience with molten salts or high-temperature fluids for R&D purposes such as materials or corrosion testing;

  • Experience with FEA software or other computational materials tools, and with developing and validating models that reproduce the behaviour of structural materials under stress preferred;

  • Experience with the application and assessment of coatings preferred;

  • Team player with effective communication and interpersonal skills, including fluency in English;

  • Ability to travel by plane and communicate outside of normal working hours when necessary.

At Seaborg we strongly value the combination of relevant experience, talent and personality traits that align with our team and overarching vision for a sustainable future. We therefore encourage applications from diverse backgrounds and are prepared to mould the job description to accommodate well-aligned candidates.


While our team is still small, our ambitions are not. Becoming a part of Seaborg presents a unique possibility to importantly impact and define the global energy landscape of tomorrow. We know that new ideas and influences are key to challenge the status quo and strive for continuous improvement, and so new hires can expect to importantly contribute to shaping both the technology and the future of the company.

We want to play an active role in enabling the personal and professional development of all employees so that they can evolve and grow to take on changing tasks and responsibilities. To give room for this development, we practice high work flexibility in an informal, merit-based environment without strict hierarchies. With time, we expect every employee to become an invaluable part of Seaborg and our success, and we underpin this expectation by offering all new employees stock options in the company.


We are based in Denmark, a country known for its high quality of life and extensive social welfare system. That means free health care and education, generous vacation arrangements, progressive maternity and paternity leave provisions, etc. More on this at


Our office is situated centrally in Copenhagen - a young and vibrant European capital on the Øresund coast with a thriving expat community and world-leading bicycle infrastructure.



Please note that we no longer accept applications for this position.

However, if you think you would be an outstanding candidate for a similar position in the future, feel free to let us know by sending an email to

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 © 2020  Seaborg Technologies

Titangade 11

2200 Copenhagen N