Role: Principal Mechanical Engineer Location: Plymouth(Hybrid) Duration: 12 months Inside IR35: Umbrella About our client: Our client is a leading global aerospace, Defense, and security company specializing in delivering complex, mission-critical solutions. With a strong heritage in engineering and innovation, they provide essential services across aviation, marine, land, and nuclear sectors, supporting governments, armed forces, and commercial clients worldwide. Renowned for their commitment to safety, sustainability, and technological advancement, our client plays a vital role in ensuring operational excellence for their customers. Join them and be part of a team that drives innovation and delivers cutting-edge solutions in some of the world's most demanding environments. The primary purpose of the Senior Mechanical Building Services Engineer role is to lead Mechanical Building Services projects delivered by subcontractors. This role ensures that outsourced designs meet technical, regulatory, and business requirements while maintaining the highest standards of quality and compliance. The successful candidate will act as the technical authority, bridging the gap between the company's engineering requirements and subcontractor performance. The key responsibilities of the role include : <...