Job Description Are you an experienced Senior Mechanical Engineer looking for an exciting opportunity to work on cutting-edge projects in the nuclear industry? Join our dynamic team and contribute to innovative engineering solutions in a challenging yet rewarding environment. Your future team: As a Senior Mechanical Engineer, you will be instrumental in delivering high-quality engineering solutions, from initial optioneering to full-scale implementation. You will work alongside multidisciplinary teams, lead small work packages, and support project managers to ensure projects are completed on time and within budget. Your missions: Lead the development and implementation of engineering solutions. Manage project deliverables, budgets, and timelines. Oversee testing and commissioning activities. Provide technical direction to junior engineers and designers. Collaborate effectively with other engineering and safety disciplines. Support project managers and lead engineers in performance tracking. Ensure compliance with relevant engineering standards, e.g. BS EN 13001, BS 2573, and BS EN 13155 Why join the community of Switchers? As one of the Top 3 Nuclear Engineering companies in the world, Assystem offer a competitive benefits package which includes: 25 days of annual leave bank holidays 8% company pension contributions Healthcare cash-plan to get money back on dental, medical, physical care Employee assistance programme including 24/7 access to free mental health support, virtual gym classes and more Get professional and industry membership fees paid for.