# Principal Mechanical Engineer* Nuclear* Permanent /* Bolton* United Kingdom* 10/06/26* On site* ShareI apply##Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.## Job Description **Join the Fusion and Modular Nuclear Business Unit!** Reporting to the FEED Engineering Manager you will be responsible for Delivering Front Engineering activities for Small Modular Reactors, Advanced Modular Reactors and Fusion projects. The Principal Engineer shall work closely with multi-disciplined teams and will deliver scope through leadership of an engineering design team.**You...