Assystem is a global leader in engineering, dedicated to accelerating the energy transition. In the UK, we’re powering progress on landmark projects like Hinkley Point C, Sizewell C, and next-generation Small Modular Reactors (SMRs). Our 7,500+ Switchers blend deep engineering know-how with cutting-edge digital tools to help build a low-carbon world—faster, cleaner, and smarter.Why Join the Community of Switchers?Becoming a Switcher means joining one of the top three nuclear engineering companies in the world. You’ll work on technically complex projects that shape the UK’s energy future while gaining opportunities to grow your expertise in a fast-paced, collaborative environment.The Job Role:This is a site role based on Hinkley Point C in Bridgwater, with relocation support available if required.As a Senior HVAC Site Engineer, you will play a pivotal role in the construction phase of a landmark energy project. Your future team will rely on your leadership to ensure HVAC systems are delivered to the highest safety and quality standards, from planning through to installation and commissioning readiness.Lead the delivery of HVAC construction work packages across assigned project areasCoordinate with contractors, supervisors, and client representatives to resolve site queriesOversee installation activities to ensure compliance with design and safety requirementsEnsure construction documentation is accurate, complete, and submitted on timeDrive planning of safe access and support surveying requirements on-siteMonitor progress, identify risks, and escalate issues to maintain delivery schedulesPromote and embed a positive health, safety, and environmental culture on-siteSupport the implementation of permitting and authorisation systems for construction activitiesDegree or trade qualification in HVAC or Mechanical EngineeringProfessional accreditation in construction, project management, or engineeringCCNSG Safety Passport and IOSH or NEBOSH qualificationProven track record in HVAC installation and construction delivery on large projectsAbility to lead and coordinate multidisciplinary site teamsStrong understanding of construction documentation and site processesKnowledge of regulatory compliance within safety-critical industriesExperience driving safe and efficient project delivery in complex environmentsExperience delivering HVAC systems on major energy, industrial, or infrastructure projectsKnowledge of UK nuclear or other highly regulated project environmentsFamiliarity with digital permitting and document control systemsSurveying or access planning experience in a construction settingStrong problem-solving skills with adaptability in dynamic site environmentsStrong problem-solving mindset with adaptability in fast-changing environmentsAdditional InformationReady to lead the way on one of the UK's biggest clean energy builds?Join a team where your skills will help power the future. Bring your mechanical expertise—and we’ll provide the platform to make your mark.Benefits include:25 days’ paid annual leave + bank holidays + option to buy or sell daysCompetitive Sick Pay – Support when you need itFree Digital Gym Access – Expert-led fitness classes24/7 Employee Support Line – Mental health, financial & legal helpWe 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. #J-18808-Ljbffr