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Senior Process Engineer


At Seaborg Technologies we are developing and bringing to market an advanced and innovative molten salt reactor technology to provide safe and sustainable nuclear energy to the world. We are working closely with regulators, shipyards, and the nuclear industry to produce floating advanced nuclear power plants by 2025 and have grown to become the leading molten salt reactor company outside of North America with an international team of more than 30 employees from five continents.  

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 to achieve global impact. 



Seaborg Technologies is looking for an experienced Process Engineer. In this position, you will be responsible for the process design of systems used in the Compact Molten Salt Reactor (CMSR). The role will be an integral part of the Engineering department and will interface and collaborate with teams of physicists, engineers, and chemists, both internally as well as externally with technical partners, sub-suppliers, and regulatory stakeholders. 


  • Technical authority on the discipline of process engineering; establish methods, principles and approaches for carrying out process engineering at Seaborg.  

  • Design reliable and safe process systems and sub-systems from requirements through final design and verification.  

  • Ensure compliance, manufacturability and compatibility of CMSR systems, continuously and iteratively revisiting requirements, interfaces, drawing annotations, etc.  

  • Identify and ensure effective application of appropriate design codes such as ASME, ANSI, etc.  

  • Analyse and apply regulatory criteria and standards to complex process designs.  

  • Participate in planning efforts and maintain schedule for design activities.  


  • Create and manage work packages of process system designs.  

  • Produce and review technical design documents, such as System Design Descriptions, Equipment Lists, Data Sheets, Technical Reports, Piping and Instrumentation Diagrams (P&IDs), Process Flow Diagrams (PFDs), etc.  

  • Produce and review process design calculations including mass balances and hydraulics.  

  • Lead and collaborate with other disciplines such as mechanical design, instrumentation & controls, and neutronics to identify and/or develop equipment design information and specifications. 

  • Plan and coordinate testing programs for equipment qualification.   



  • Bachelor’s degree in relevant engineering discipline. 

  • At least 5 years of experience working with and process systems. 

  • Experience with high temperature process fluid systems, or similar demanding environments.  


  • Familiarity with high strength, corrosion resistant, nuclear compatible materials for use in high temperature environments. 

  • Understanding of high temperature fluid systems and typical fittings for the nuclear industry and applicable standards, such as ASME BPVC Section III, Division 5. 

  • Experience from the nuclear industry is a plus. 

  • Experience managing projects with internal and external team members. 

  • Experience from developing projects in new fields where existing solutions and products do not exist is a positive. 


  • Driven to take on responsibility and to establish and develop the process engineering discipline within Seaborg proactively and sometimes independently.   

  • Strong attention to detail and quality. A finisher at heart.  

  • Ability to creatively approach and overcome process design problems, while retaining motivation over multiple iterations of the same design.  

  • Patient demeanour with willingness to explain, justify, negotiate and provide guidance, also in times of stress.   

  • Capable and willing to speak up and raise opinions, especially about potential pitfalls and concerns, but also commits to decisions.  

  • Team player able to interact with, listen to and understand specialists and managers in a wide variety of technical disciplines. Seaborg’s success depends on our ability to work together.  


  • The chance to impact the global energy landscape
  • A modern office space near the most vibrant area of Copenhagen
  • A real opportunity to have your voice heard – we’re a young and fast-growing company
  • A varied social calendar driven by team members (board-game nights, sports groups, summer company trips, family events, beer brewing etc.)
  • Subsidised lunch
  • Flexible hours
  • International team
  • Available opportunities and support to advance your personal development
  • Significant stock warrants for all new employees


We are based in Denmark, a country known for its high quality of life and extensive social welfare system. Read about all the benefits of living in Denmark in here.

Intrigued? Please submit a motivational letter and CV. We look forward to reading your application and, if all goes well, changing the world together. 


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