Mechanical Engineer – Design & Simulation (f/m/d)

About Focused Energy Focused Energy is an international deep-tech company based in Germany and the US, working to commercialize laser-driven nuclear fusion. Our mission is to provide clean, safe, and virtually unlimited energy to the world. We are rapidly scaling and looking for talented individuals who thrive in building clarity and structure within fast-growing environments. About the Role As a Mechanical Engineer – Design & Simulation, you’ll perform engineering analysis and simulation work across Focused Energy projects, helping design and validate complex mechanical systems before hardware is committed. You’ll provide the analytical confidence needed to make sound design decisions across structural, thermal, dynamic, and fluid-system performance. Working closely with senior mechanical engineers, systems engineers, project teams, and other engineering disciplines, you’ll use modelling and simulation to identify design risks early, recommend mitigations, and ensure mechanical designs are technically sound, manufacturable, safe, and ready for integration. Your work will contribute to systems including vacuum chambers, laser integration, diagnostic structures, and facility infrastructure. What You’ll Do Perform structural, mechanical, and thermal analysis using FEA tools such as ANSYS, Abaqus, COMSOL, or equivalent. Carry out fluid-system analysis and thermal modelling to support mechanical design decisions. Assess vibration, stability, and dynamic behaviour of mechanical assemblies and identify potential design risks. Validate simulation outputs against design requirements, engineering standards, and expected operating conditions. Translate analysis results into practical design recommendations that improve performance, safety, manufacturability, and system compatibility. Develop and maintain 3D CAD models and engineering drawings using Autodesk Inventor or a similar tool. Define and execute verification activities, prepare analysis reports, and provide simulation evidence for design reviews. Collaborate with mechanical, systems, and project engineering teams to define interfaces, communicate results, and support multidisciplinary design decisions. Who You Are You are an analytical and technically rigorous mechanical engineer who enjoys solving complex engineering problems through modelling and simulation. You take a methodical approach to setting up analyses, checking assumptions, interpreting results, and documenting conclusions. You can translate complex simulation outputs into clear, actionable engineering decisions. You identify design risks early and proactively propose practical mitigation strategies. You communicate clearly with both technical and non-technical stakeholders, adapting the level of detail to the audience. You collaborate effectively across mechanical, systems, and project engineering disciplines. You take ownership of the quality, traceability, and accuracy of your analysis work and design evidence. You are detail-ori