Design Engineer, Nuclear Safety

Are you ready to be part of a dynamic team dedicated to ensuring the safe and efficient operation of nuclear power plants? As a Design Engineer in our Nuclear Safety team at Fortum, you'll play a crucial role in shaping the future of nuclear energy. In this role you will collaborate with a diverse group of experts to support Fortum’s internal preparatory work for possible nuclear newbuild, external nuclear customers, and co-owned units. If you're passionate about nuclear safety and ready to take on new challenges, we want to hear from you! About the role We are looking for a Design Engineer. Your position in the organization is in the Nuclear Safety team of Engineering & Projects (E&P) business area, located in Espoo, Finland. The Nuclear Safety team has a wide range of different competencies which are utilized in supporting safe and efficient operations of our nuclear units, external nuclear customers, and the development of new nuclear and nuclear R&D activities in Fortum. As Design Engineer, you will work closely with our other nuclear experts and external partners to create solutions for our customers in Finland and internationally. The core focus of this role is severe accident analysis and model development. Your primary responsibilities will be:

• Perform, report, and deliver severe accident analyses using MELCOR.
• Maintain and develop the severe accident analysis model of Loviisa NPP.
• Evaluate and develop severe accident management concepts for new nuclear projects.

Depending on your background, strengths, and interests, you may also:

• Perform assessments related to nuclear safety and safety design.
• Support compliance with nuclear regulatory requirements, safeguards obligations, and export control requirements.

About you We expect you to have a master’s degree or other relevant degree e.g. in nuclear engineering, energy technology, power plant engineering or physics. To succeed and thrive in this role:

• You have experience with MELCOR, MAAP, CONTAIN, or other lumped-parameter codes.
• You are proficient in using Python for post-processing, data analysis, and automation of engineering tasks.
• You have a solid understanding of nuclear power plant technologies, severe accident phenomena, including in-vessel retention (IVR), and nuclear safety principles. Familiarity with SMRs and advanced reactor concepts is considered an advantage.
• You are familiar with Finnish and international nuclear licensing and regulatory requirements.
• You have fluent oral and written communication skills in English, and the ability to read and understand Finnish is essential, as some documentation and background materials are available only in Finnish. Swedish is considered an advantage.

We offer you At Fortum, we believe in a better future and want to be involved in shaping it. Our workplace is a safe place, both physically and mentally. You will grow with professional colleagues, being trusted and free to challenge yourself. We offer comprehensive benefits, flexible working hours, and hybrid work model to support your productivity, development and wellbeing. We are committed to build diverse teams where everyone feels included and is treated equally. More information about our culture and benefits can be found here. Espoo office is a smoke-free workplace. Interested? Submit your application by 15.10.2026 at the latest. If you would like to hear more about the position, please contact Kaisu Leino through e-mail kaisu.leino@fortum.com As part of our recruitment process, we use assessment tests, digital reference checks and Microsoft Copilot to transcribe interviews. This helps us ensure a structured, fair and high-quality process for all candidates. To be selected for the position, the applicant must go through background clearance and a health examination including drug testing. We are Fortum Fortum is a Nordic energy company. We generate and deliver reliable energy to our customers and the Nordic energy system while at the same time helping industries decarbonise their processes and grow. Our core operations comprise efficient and best-in-class low-carbon power generation, customer services, and heating and cooling. Fortum’s power generation is already 99% from renewable or nuclear sources with one of the lowest specific CO2-emissions in Europe. We are guided by our ambitious SBTi-validated emission reduction targets on our way towards net-zero by 2040. For our ~4,500 employees, we commit to be a safe and inspiring workplace. Fortum's share is listed on Nasdaq Helsinki. fortum.com