Principal Mechanical Engineer Location: Warrington, Manchester (Hybrid, 3 days/week onsite)Contract: 12 monthsRate: 57- 78/hr (Umbrella, Inside IR35)Security Clearance: Must be eligible for SC Are you an experienced Mechanical Engineer with a background in defence, nuclear, or high-integrity engineering projects? We''re recruiting multiple Senior and Principal Mechanical Engineers to support cutting-edge, safety-critical programmes across the UK''s defence infrastructure. This is a long-term opportunity with a leading engineering consultancy delivering strategic work across secure sites. Projects You''ll SupportYou''ll play a key role on a range of high-profile Defence programmes, including: Major decommissioning and infrastructure upgrades at a leading defence establishmentSubmarine decommissioning demonstrator development for the UK MoD at RosythTechnical support frameworks for the Defence Infrastructure Organisation (DIO) Key Requirements Degree in Mechanical Engineering (BEng/MEng)Chartered Engineer (CEng)Experience in the nuclear or defence sectorsStrong background in Mechanical EngineeringProficient with Autodesk InventorProven experience with mechanical or manual handling systemsEligible for SC clearance (must have lived and worked in the UK for the past 5 years) Why Apply?This is a unique opportunity to influence nationally significant programmes, working with expert teams in an environment that values innovation, safety, and high standards. Interested?Apply today wit