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Senior Building Service Design Engineer

Job in Manchester, Greater Manchester, M9, England, UK
Listing for: NES Group Ltd
Full Time position
Listed on 2026-10-17
Job specializations:
  • Engineering
    Mechanical Engineer, Building Services Engineer
Salary/Wage Range or Industry Benchmark: 96000 - 122000 GBP Yearly GBP 96000.00 122000.00 YEAR
Job Description & How to Apply Below
Senior / Principal Mechanical Building Services Design Engineer

Location:

Manchester, hybrid working

Duration: 6-month rolling contract

Outside IR35

About the Role

As a Senior / Principal Mechanical Design Engineer, you will lead the design delivery of complex mechanical building services and HVAC solutions within the company portfolio of electrical substation and HVDC interconnector projects.

You will provide technical leadership throughout the project lifecycle, ensuring designs are safe, compliant, efficient, maintainable and aligned with customer and regulatory requirements.

The role requires independent ownership of mechanical work packages, management of technical risks, coordination with multidisciplinary teams and support to the development of junior engineers.

Key Responsibilities
  • Technical Leadership
    • Lead the design and delivery of mechanical and HVAC systems from concept through detailed design and construction support.
    • Take ownership of assigned mechanical packages, ensuring technical quality, programme compliance and successful delivery.
    • Develop and review design calculations, specifications, schedules, reports and engineering studies.
    • Ensure all designs are safe, practical, maintainable and suitable for construction and operation.
    • Manage design assumptions, constraints and engineering decisions throughout project execution.
    • Provide technical guidance on complex engineering challenges and support project teams in developing effective solutions.
  • Design Delivery
    • Produce and review HVAC, plumbing / public health, and associated mechanical systems designs aligned with RIBA stages.
    • Develop system schematics, equipment selections and specifications.
    • Carry out design calculations including:
      • Heating and cooling loads
      • Ventilation requirements
      • Ductwork sizing
      • Pipework sizing
      • Pressure loss calculations
      • Plant selection
    • Coordinate design deliverables through internal review and approval processes.
    • Support BIM and digital engineering workflows.
    • Knowledge of CAD and 3D modelling software
  • Compliance and Quality
    • Ensure compliance with:
      • UK Building Regulations
      • CDM Regulations
Position Requirements
10+ Years work experience
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