Company Description ⚡️ About Assystem Assystem is a global leader in engineering, digital, and project management services, driving the UK’s energy transition since 1996. With 7,500 Switchers worldwide, we combine deep engineering expertise with digital innovation to deliver complex, low-carbon infrastructure. In the UK, we’re proud to support landmark nuclear projects like Hinkley Point C, Sizewell C, and emerging SMR programmes. Why Join the Community of Switchers? Join one of the three largest nuclear engineering companies in the world. Here, you'll work on world‑class energy‑transition missions, collaborating with top teams delivering Hinkley Point C, Sizewell C and SMRs. Become part of an elite global community, driving innovation and excellence every day. Job Description The Job Mission Your future team seeks a Construction Project Engineer specialising in Mechanical to support major nuclear projects. You’ll partner closely with project and site teams to ensure mechanical scope delivery meets safety, quality, schedule and budget goals. You’ll engage in technical leadership, documentation and stakeholder coordination. Lead mechanical scope delivery aligned to project execution plans. Coordinate multi‑disciplinary teams including suppliers and installation contractors. Monitor mechanical progress, costs and schedules against project milestones. Develop technical specifications in collaboration with construction and commissioning teams. Facilitate and chair mechanical‑focused project meetings, ensuring contract compliance. Identify and manage mechanical‑related risks and issues, escalating when needed. Maintain up‑to‑date project documentation: PEPs, quality plans and briefs. Promote and uphold rigorous health, safety, environmental and quality standards. Qualifications Essential Skills Degree in Mechanical Engineering. Solid experience delivering projects from concept to operation. Strong command of project management principles (APM). Prior leadership of multi‑disciplinary teams in construction. Experience in a highly‑regulated industry. Proficient in safety‑critical environments with strong H&S culture. Ability to manage budgets, schedules and commercial frameworks. Excellent stakeholder communication and reporting skills. Skilled in Word, Excel, and PowerPoint for project documentation.✔️ Desired Skills Familiarity with CDM regulations and H&S at Work legislation. Prior involvement in procurement and tender processes. Knowledge of Quality Assurance systems and governance frameworks. Exposure to pre‑operations or commissioning teams. Additional Information Ready to shape the future? Join your future team on-site at one of the most ambitious nuclear power projects in Europe. Be part of a collaborative mission to uphold the highest construction and quality standards. Benefits include: Hybrid Working Opportunity Flexible working hours ️ Pension scheme (8% company / 4% personal) ️ 25 days’ paid annual leave bank holidays option to buy or sell days Professional fees reimbursed Employee referral scheme Competitive Sick Pay – Support when you need it Income Protection & 3× Salary Death-in-Service Cover Free Digital Gym Access – Expert-led fitness classes 24/7 Employee Support Line – Mental health, financial & legal help We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future