Principal Mechanical Engineer – Nuclear Front-End & Fusion

Assystem, a global nuclear engineering group, seeks a Principal Engineer to lead Front Engineering for Small Modular Reactors, Advanced Modular Reactors and Fusion projects in the Fusion and Modular Nuclear Business Unit. You will drive optioneering, design documentation, and system integration across multidisciplinary teams.

You will chair design reviews, lead HAZID/HAZOP activities, and ensure strict adherence to H&S policies and standards while mentoring junior staff and promoting internal