Overview

Our client is a leading global aerospace, defence, and security company specializing in delivering complex, mission-critical solutions. They operate across aviation, marine, land, and nuclear sectors, supporting governments, armed forces, and commercial clients worldwide. The organisation is renowned for safety, sustainability, and technological advancement, playing a vital role in ensuring operational excellence for its customers.

Role: Principal Mechanical Engineer

Location: Plymouth (Hybrid)

Duration: 12 months

Inside IR35: Umbrella

Role purpose

The primary purpose of the Senior Mechanical Building Services Engineer role is to lead Mechanical Building Services projects delivered by subcontractors. This role ensures outsourced designs meet technical, regulatory, and business requirements while maintaining high 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.

Key responsibilities

• Prescribe the Mechanical Building Services requirements for design projects.
• Specify Mechanical Building Services aspects in Scope of Work Documentation.
• Produce estimates and assist commercial departments in the production of outgoing tender responses.
• Support tender reviews from a technical perspective.
• Represent our client at meetings with stakeholders and contractors.
• Provide technical oversight of Mechanical Building Services designs through frequent reviews and progress meetings.
• Support Design Reviews to ensure subcontractor designs align with company requirements, industry standards, and regulatory compliance.
• Design Validation: conduct independent assessments, technical audits, and feasibility reviews to verify design integrity and functionality.
• Lead author of design documentation.
• Respond to subcontractor Technical Queries.
• Represent the Mechanical Services Technical Authority by leading on-site visits and, where appropriate, provide guidance and leadership to staff.
• Conduct site surveys, inspections, and monitor site works.
• Lead the provision of advice to line management and other key stakeholders on the implementation and maintenance of design documentation and compliance with relevant codes, standards, and legislation.
• Provide technical oversight to junior engineers.
• Maintain complete records and archives to company standards.

Required qualifications and experience

• Excellent understanding of mechanical engineering principles for the design, operation and maintenance of Steam & Condensate, Industrial Gases, Fresh Water, Demineralised Water, HVAC, Domestic Water services, etc.
• Knowledge and experience of BREEAM, DREAM, Building Regulations.
• Experience in a design consultancy and/or contractor design environment. Knowledge/experience in managing a small team of engineers.
• Good level of computer literacy in a range of digital tools.
• Knowledge of the design lifecycle.
• Detailed knowledge of applicable regulations, legislation and technical standards for mechanical services system design.
• Knowledge of operating within nuclear or other high-hazard industries.
• Familiar with energy reduction methods and approaches to decarbonising buildings, including principles of building physics such as passive design solutions.
• Experience of commissioning and post-installation evaluation of performance.

Please apply if you want to be part of a leading global defence and security company that delivers complex, mission-critical solutions.

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