Senior Mechanical Building Services Design Engineer

Overview

Birmingham, United Kingdom | Posted on 02/06/2026

• Lead delivery of geothermal and mechanical system designs across feasibility and concept design (RIBA Stages 1–2), scheme design, FEED, and detailed design (RIBA Stages 3–4), delivery, commissioning, and operational support
• Produce and review feasibility studies, technical reports, and specifications; concept designs, layouts, system options; detailed design documentation and calculations
• Develop and review designs for ground heat exchanger systems and geothermal layouts; plantroom layouts (2D and 3D); thermal, hydraulic, and systems models
• Size and select heat pumps, DACs, boilers, ACCs, CHPs, and ground loops; size pumps, valves, buffer vessels, DHW cylinders, PHEs, and ancillary equipment
• Develop and review general and particular mechanical specifications; control philosophies, control logic, and DESOPS; mechanical equipment schedules and electrical load schedules
• Size ground heat exchangers using industry-recognised software (e.g., GLD, EED)
• Carry out and review heat loss and heat gain calculations (IES / Excel); energy performance and operational data analysis; create, maintain, and review engineering calculation spreadsheets
• Act as the lead technical interface with clients; manage and maintain strong client relationships
• Lead day-to-day project delivery within GED’s internal engineering team and the client’s engineers and external consultants
• Review and understand client specifications;
  Employer’s Requirements and Work Instructions; identify potential non-compliances and develop mitigation strategies; manage RFIs and technical clarifications; review, approve, and issue external meeting minutes and technical notes
• Support project management through scope definition, programme management, internal budget control, and variation orders; lead project handover activities
• Lead mechanical design coordination at RIBA Stages 1–2 with architects and electrical, structural, and BMS designers; support mechanical coordination at Stages 3–4 to ensure design intent is maintained; review and approve developed and detailed designs
• Attend and contribute to installation inspections and snagging; system troubleshooting and remedial strategy development; support remote monitoring and seasonal commissioning; review as-built documentation
• Mentor and support Intermediate and Junior Engineers; review calculations, drawings, and reports; provide structured technical feedback and contribute to GED’s design standards, calculation tools, engineering workflows and best practices

• BEng / MEng / MSc in Mechanical Engineering, Building Services Engineering, or a related discipline
• Extensive depth of professional experience in mechanical building services, geothermal, or low-carbon energy system design
• Strong technical capability in geothermal and ground source heat pump systems; low-carbon heating and cooling systems; building heat loss and heat gain calculations; HVAC system design and equipment sizing (heat transfer, pipework and ductwork sizing, systems hydraulics and thermodynamics)
• Very good understanding of heat pump operation, Rankine cycles, mechanical components, and control philosophy
• Strong working knowledge of standards and guidance (CIBSE, BSRIA, GSHPA/IGSHPA, HWA, relevant BS and EN standards)
• Software and tools:
  AutoCAD; GLD / EED;
  Microsoft Office (Word, Excel, PowerPoint)
• Strong technical writing and client presentation skills; ability to work in a small consultancy with high responsibility
• Right to work and live in the UK;
  Chartered Engineer (CEng) or working towards chartership;
  Certified Geo Exchange Designer (CGD) or working towards certification
• Consultancy or client-facing experience; experience supporting projects through construction, commissioning, and operation; experience supervising or line-managing engineers
• 10+ years of experience in mechanical building services, geothermal, or heating + cooling / low-carbon energy system design