Mechanical calculations engineer

Your mission

You will be responsible for mechanical calculation work for a system or part of the system related in Thorizon’s reactor design. You will be a key person of the calculation expertise center, whose primary missions are, on the one hand, to provide expertise in this area to the system in charge of the reactor design studies and, on the other hand, to define, execute, and deliver the mechanical deliverables with calculation specification, calculation strategy and hypothesis and calculations notes within the performance, cost, and time constraints of our project. 

In this role you will:

Within this general framework, you will own your activities to ensure the quality and validity of the studies and work performed and develop mechanical calculation expertise in line with the needs of the Thorizon project and its future developments. Concretely, you support system design teams (from PILOT to FOAK/NOAK) by providing deep calculation engineering input and ensuring that all design choices are technically sound and consistent with requirements and applicable Codes & Standards. You take responsibility for the correct use of calculation tools and for maintaining high-quality, reliable studies. 
A key part of your role is to ensure strong interfaces between mechanical engineering and the wider organization: system design, project teams, licensing, safety, functional leads, and management.
Your level of expertise allows you to prioritize based on the importance of the needs, and as an expert, you have the power to recommend any necessary actions for the project related to your area of expertise. 
Furthermore, you participate in external networks, including international initiatives, to stay at the forefront of industry development.

 
In this environment, you get the unique opportunity to put your knowledge to the best use, develop your ideas, explore various aspects of mechanical engineering, and play a crucial role in the company’s growth.

About you:

• M aster 's degree and proven experience in mechanical engineering calculation s (5 years) .
• Essential experience in FEM simulation and calculation analysis like linear structural analysis, structural seismic response, thermal stress and fatigue of at least 5 years with a confirmed or even expert level with A BAQUS a nd /or ANS YS software .
• Essential experience with application of code ASME III and/or RCC-M of at least 3 years.
• Good knowledge of design engineering by calculation approach , , which you combine with a practical approach, supporting design team.
• Good knowledge experience in CAD practices .
• Good knowledge in office tool applications.
• You get inspired by an organization with a large variety of people, with different experiences and backgrounds , and have the ability to adjust your working style depending on the situation and the people involved : you are agile but rigorous.
• You are eager to learn and like challenge s .
• You rethink issues to find practical solutions to difficult problems, and you demonstrate agility by minimizing complexity. You have a pragmatic and constructive mindset.
• You are rigorous and autonomous in your field of expertise
• You have a good sense of judgement: you think strategically (in your field and consider all the dimensions of the project), and you know how to prioritize your actions according to the key issues at stake.
• You have excellent communication skills: you listen before you react, you are concise, you treat people with respect, you keep calm in stressful situations, you have excellent writing skills. You are an excellent communicator in English , and preferably also French or Dutch, both spoken and written. 
• You create impact: your productions are models for your colleagues .

What you can expect from us:

• The opportunity to help realize the most promising reactor technology and advance Europe's energy future
• Being part of an exceptional team that combines engineering rigor, scientific excellence, and entrepreneurial drive
• Working in multidisciplinary teams on ambitious missions, with responsibility and meaningful impact from day one
• A fast-moving deep-tech environment where initiative is valued and people are trusted to make decisions
• Complex, multidisciplinary challenges that will stretch you and accelerate your growth
• Competitive compensation and participation in our employee profit-sharing plan
• An international workplace with offices in the heart of Amsterdam and Lyon 

About us

At Thorizon, we’re a passionate team spread across Amsterdam and Lyon, all working together to develop new nuclear power solutions. We design and create frontier technology for Molten Salt Reactors (MSRs).

Our purpose is to accelerate the availability of clean energy and help solve the climate crisis. 

We are in the development phase and aim to solidify our design through analyses, simulations, experiments, prototyping, and partnerships. At Thorizon, we believe a strongly coupled multidisciplinary technology development requires a culture of full openness and transparency. That’s why we foster values like unity, communication, and support to ensure we grow together as a team while achieving our purpose.