Senior/Principal Design Engineer

About the Role

We are seeking a Senior / Principal Mechanical Design Engineer to lead the delivery of mechanical building services and HVAC designs for major electrical infrastructure projects. You will provide technical leadership, manage mechanical work packages, ensure compliance with industry standards, and support multidisciplinary project teams.

Key Responsibilities

Technical Leadership

• Lead mechanical and HVAC design from concept through construction support.
• Manage mechanical work packages, ensuring quality, compliance, and delivery.
• Prepare and review calculations, specifications, reports, and engineering documentation.
• Provide technical guidance and resolve complex engineering challenges.

Design & Project Delivery

• Produce and review HVAC and mechanical building services designs.
• Develop system schematics, equipment selections, and specifications.
• Complete design calculations, including:
  • Heating and cooling loads
  • Ventilation requirements
  • Ductwork and pipework sizing
  • Pressure loss calculations
  • Plant selection
• Support BIM, CAD, and 3D modelling activities.

Compliance & Safety

• Ensure compliance with Building Regulations, CDM, CIBSE guidance, and relevant standards.
• Conduct design reviews and risk assessments.
• Support HAZID, HAZOP, and technical risk workshops.

Stakeholder Coordination

• Work closely with civil, structural, electrical, controls, and fire engineering teams.
• Coordinate with clients, suppliers, contractors, and consultants.

Qualifications & Experience

Essential

• Degree in Mechanical or Building Services Engineering.
• Chartered Engineer (CEng) status, or working towards chartership.
• Strong experience in mechanical building services and HVAC design.
• Experience delivering multidisciplinary engineering projects.
• Excellent communication and stakeholder management skills.

Desirable

• Experience within critical infrastructure, power, substations, HVDC, industrial facilities, or data centres.
• Knowledge of BIM and digital engineering processes.
• Experience managing suppliers and contractors.