Do you have proven experience as a Principal or Senior Heating, Ventilation & Air Conditioning Engineer? Do you thrive in a multidisciplinary environment where your HVAC expertise directly shapes nuclear and industrial innovation? Are you looking for a new assignment with a company that values technical leadership, real responsibility, and meaningful impact? If so, this could be the opportunity for you! The Opportunity An opportunity is available for a highly experienced Principal/Senior HVAC Engineer to support a major nuclear project. The assignment will be based in Stockton-on-Tees and hybrid working is available based around a working week of 40 hours. Rate will be dependent on experience due to the potential for candidates of different levels of seniority to apply. The role will support the HVAC Capability team in all aspects of HVAC and Building Services, preferably with knowledge and experience in nuclear standards and processes, specifically the delivery of the design of HVAC Systems or modification to existing HVAC Systems. Your duties and responsibilities: * Ability to be client facing and demonstrate confidence as a subject matter expert, hence able to support all stakeholders. * Manage a small team of engineer/designers * Design of Ventilation systems from basic principles and an understanding of containment philosophy * Production of HVAC system design deliverables, specifying heat rejection plant (eg. air / water cooled condensers, heat pumps and heat recovery systems of varying types. The design of HVAC systems for cooling industrial process environments. * Steam system design * Production of system schematics / Engineering Flow Diagrams (EFDs). * Preparation of psychrometric calculations. You will have the following qualifications & experience: * Degree in Building Services Engineering or minimum HND plus extensive experience in the industry. * Experience in the Use of industry standard software such as Hevacomp, Revit and Pipenet. * Awareness of EG_0_1738_1 - Ventilation of Radioactive Areas. * Demonstrable experience in a similar role/environment, with recent relevant exposure of work in a regulated industry. * An understanding of AutoCAD packages and its capabilities. It’s great if you also have the following: * Thermal modelling experience would be an advantage. The setting for the role The role will be mainly office based with trips to site if required. A safety induction will be provided. Millbank Holdings Ltd is an equal opportunities employer committed to creating an inclusive and diverse workforce. We welcome applications from all suitably qualified individuals, regardless of background, and encourage candidates from underrepresented groups to apply. We are proud to be a member of the Disability Confident Scheme, and we are committed to ensuring an accessible and supportive recruitment process for everyone. If you require any adjustments at any stage, please let us know and we’ll do our best to accommodate. Millbank operates as both an Employment Agency and an Employment Business