Senior Mechanical Systems Engineer – Nuclear Industry(H/F)

Job Responsibilities As a Senior Mechanical Systems Engineer , you will be responsible for overseeing the design, delivery, and installation of critical mechanical systems, including high-pressure piping , within a nuclear power plant environment. You will ensure compliance with engineering standards, support system commissioning, and provide technical leadership to resolve site challenges while prioritizing the integration and performance of piping systems. Dimensions Team size : Coordination with a team of 10 engineers and technicians, with potential expansion as the project evolves, including specialists in piping systems . Budget responsibilities : Oversight of contracts worth £100M , ensuring cost-efficient and timely delivery of mechanical and piping systems. Systems involved : Critical cooling, ventilation, and high-pressure piping systems specific to nuclear power operations. Principal Responsibilities Technical Leadership Review and validate detailed engineering designs for mechanical systems, with a specific focus on piping systems to ensure compliance with nuclear safety and quality standards ( RCC-M , ASME ). Provide expertise in resolving technical challenges related to piping installation , such as welding deviations, material selection, and routing optimization. Collaborate with design teams to address system modifications and ensure constructability. Delivery Oversight Supervise contractors responsible for piping prefabrication , welding, and on-site installation, ensuring alignment with project schedules and construction priorities. Oversee and coordinate Non-Destructive Testing (NDT) and Hydro-pressure Testing (HPT) activities for high-pressure piping systems. Monitor and validate the performance of critical piping systems to ensure readiness for commissioning. Quality and Documentation Validate engineering and quality assurance documentation related to piping systems , ensuring proper traceability and compliance with regulatory standards. Compile and hand over all necessary documentation to commissioning teams, ensuring all evidence is complete for system acceptance. Stakeholder Collaboration Act as the primary point of contact for piping contractors, project management teams, and commissioning leads to ensure seamless communication and project progress. Identify and mitigate risks related to piping systems, while providing regular reporting and updates to stakeholders. The Ideal Candidate Experience 10+ years of experience in mechanical engineering roles, with demonstrated expertise in piping systems within nuclear or similarly regulated industries. Proven track record of overseeing high-pressure piping design , prefabrication, and installation. Experience managing contractors and delivering complex engineering projects involving piping networks. Qualifications Degree in Mechanical Engineering or equivalent ( Master’s preferred ). Professional accreditation (e.g., Chartered Engineer or equivalent). Strong knowledge of regulatory codes, particularly RCC-M , ASME , and other piping standards. Skills In-depth understanding of piping system design , including thermal and hydraulic considerations. Strong problem-solving capabilities and meticulous attention to detail. Exceptional written and oral communication skills to coordinate effectively with contractors and stakeholders. Leadership skills to manage multidisciplinary teams and influence decision-making. Welcome to ACEPP Who Are We at ACEPP Entreprise, a Subsidiary of HEVERETT Group? As an engineering firm specializing in Infrastructure Construction in France and internationally, we bring the expertise of our team to major industrial projects in the nuclear and naval sectors. Our activities are organized around several core areas: PMO or Project management Work and site supervision Testing, commissioning, and handover to operators Maintenance engineering In association with AXEAL , a HEVERETT Group subsidiary offering digital engineering solutions, we also provide a comprehensive range of services related to Digital MCO Engineering . With over 25 years of experience, we continue to pursue an ambitious yet measured growth strategy, enabling steady progress while staying true to our values of listening, expertise, and commitment . By joining the team at ACEPP Entreprise, you will be part of a human-scale organization with strong technical expertise. Our close-knit management style ensures your initiatives are recognized, and you can easily discuss your career aspirations. Additional Information Join Our Team and Thrive-Here's What Awaits You : Prioritize Your Well-Being : With our Private Medical Insurance, you and your loved ones gain quick access to premium healthcare services, including dental insurance, giving you peace of mind and ensuring well-being is always a priority. Build a Stronger Financial Future : Our Enhanced Pension Scheme supports your future with boosted retirement savings, enhanced by employer contributions and tax benefits-so you can look forward to a financially secure tomorrow. Commute Smart, Commute Green : Our Cycle to Work Scheme makes eco-friendly commuting affordable. Enjoy tax savings while getting a new bike, making your commute healthy, sustainable, and wallet-friendly. Exclusive Perks, Everyday Joy : With the Employee Perks Program, unlock exclusive discounts, rewards, and benefits that enhance your work-life balance and add value to your daily life. Treat yourself to a lifestyle upgrade-just because you're part of our team. Grow Our Team & Get Rewarded : Our Employee Referral Program rewards you for bringing great talent into our team. Help us grow, foster a vibrant workplace culture, and expand your own professional network along the way. Time for You-Because You Deserve IT : Recharge with an Extra Day Off ! Enjoy an additional paid day to focus on you, supporting a balanced lifestyle and enhancing overall well-being. Make Moving Easier : We offer a £2,000 Relocation Package to help make your transition smooth and stress-free if you're moving to join us. Honoring Your Commitments : If you're a reservist, we support your service with dedicated Reservist Days, allowing you to balance both career and service.