HVAC Systems Engineer About the Opportunity: NRL is supporting a major client in the recruitment of a skilled and forward-thinking HVAC Systems Engineer to join their expanding Energy Programmes Business Unit. This team is at the forefront of shaping the future of nuclear power. As an HVAC Systems Engineer, you'll play a pivotal role in reviewing and updating system documentation and data tools, and defining mechanical, electrical, nuclear safety, and control logic requirements. You’ll work across multidisciplinary engineering areas to ensure compliance with engineering rules, methodologies, and quality processes. This is an exciting opportunity to contribute to some of the most complex and nationally significant energy projects in the UK and Europe. This role offers the chance to develop your technical expertise in a collaborative environment where innovation, safety, and high-quality delivery are at the centre of everything we do. Key Responsibilities: Analyse and verify input data, requirements, and lessons learned from other stations. Perform component sizing (pumps, pipework, fans, tanks) and carry out thermal-hydraulic calculations using in-house or commercial tools. Conduct thermal calculations relating to building systems. Support the procurement team in developing technical specifications and supplier documentation. Manage modification requests, ensuring applicability and alignment with system r...