Job Description

Key Responsibilities

Technical Leadership & Engineering Design

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, and 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 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

Project & Client Leadership

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 The client's engineers and external consultants Review and understand: Client specifications Employer's Requirements and Work Instructions Identify potential non-compliances, raise them proactively with the client, and develop mitigation strategies Manage Requests for Information (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 Support variation orders where scope changes occur
Lead project handover activities

Design Coordination & Quality Assurance

Lead mechanical design coordination at RIBA Stages 1-2 with: Architects Electrical, structural, and BMS designers Support mechanical coordination at RIBA Stages 3-4, ensuring design intent is maintained Review and approve developed and detailed designs Ensure all designs are: Technically robust Coordinated across disciplines Fully compliant with relevant standards and guidance
Support and participate in external design reviews and independent technical validation

Site, Installation & Operational Support

Attend and contribute to: Initial site surveys Design development meetings Carry out or support: Installation inspections and snagging System troubleshooting and remedial strategy development Support: Remote monitoring Seasonal commissioning
Review of as-built documentation

Mentoring & Team Development

Mentor and support Intermediate and Junior Engineers Review calculations, drawings, and reports produced by junior team members Provide structured technical feedback and guidance Contribute to the development of GED's: Design standards Calculation tools
Engineering workflows and best practices

Essential

Skills & Qualifications

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 Mechanical building services design Low-carbon heating and cooling systems Proficient in: Building heat loss and heat gain calculations HVAC system design and equipment sizing, including: Heat transfer Pressure drops Psychrometrics 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 relevant standards and guidance, including: CIBSE BSRIA GSHPA / IGSHPA HWA Relevant BS and EN standards Proficient in: AutoCAD GLD / EED Microsoft Office (Word, Excel, PowerPoint) Strong technical writing and client presentation skills Comfortable working in a small consultancy environment with high responsibility
Right to work and live in the UK.

Desirable

Chartered Engineer (CEng) or working towards chartership Certified GeoExchange 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 experience in mechanical building services, geothermal, or heating + cooling / low-carbon energy system design