Building Service Design Engineer

Building Service Design Engineer - Low-carbon Technologies Location: London Salary: Competitive We are looking for a talented Building Service Design Engineer who thrives at the drawing board as much as they do leading a team. The scope of the role covers the company’s full range of low-carbon technologies – heat pumps, photovoltaic (PV) solar systems, mechanical ventilation with heat recovery (MVHR), underfloor heating, and battery storage – across both domestic and commercial projects. The role also involves regular client and stakeholder contact, so we need someone who is confident communicating technical concepts to non-technical audiences and comfortable in a client-facing environment. Responsibilities Design (primary Focus) : * Act as the Lead Designer across the business, personally producing M&E technical drawings, schematics, and system layouts for heat pump, PV, MVHR, underfloor heating, and battery storage projects in both domestic and commercial settings. * Specify equipment including heat pumps, circulation pumps, piping, inverters, battery units, ventilation units, and associated controls. * Carry out power and control system design, including electrical schematics and wiring diagrams. * Undertake 2D and 3D CAD modelling to support project design and client presentations. * Carry out site surveys and feasibility assessments for new and existing projects. * Review site installations to ensure conformance to design specifications and relevant standards. Client And Stakeholder Engagement: * Support the sales team on client calls and meetings, providing technical input to help scope and win new projects. * Meet clients on site to discuss requirements, present design proposals, and address technical queries. * Act as a technical point of contact for Architects, consultants, and other external stakeholders, answering design and specification questions. Team Leadership And Management: * Manage, mentor, and develop a small team of Mechanical and Electrical Design Engineers, allocating workload and providing day-to-day technical guidance. * Set and maintain design standards, procedures, and quality benchmarks across the team. * Evaluate and implement advances in design technologies and software to enhance the team's capabilities and efficiency. * Collaborate with project management, sales, and installation teams to ensure designs are practical, cost-effective, and delivered on time. * Support the growth of the design function as the business scales, including involvement in recruitment and onboarding of new Engineers. Profile (Essential) * Minimum HND Qualified Engineer (mechanical or electrical); degree-level qualification preferred. * At least three years of hands-on M&E design experience within the building services or renewable energy industry. * Proven experience designing systems involving one or more of heat pumps, PV solar, MVHR, underfloor heating, or battery storage. * Strong proficiency in 2D and/or 3D CAD software (e.g. AutoCAD, Revit, or equivalent). * Solid understanding of UK building regulations, Part L, and relevant standards (e.g. MCS, BS 7671). * Comfortable operating as a working Designer while also managing a team – this is not a desk-only management role. * Confident communicator, happy engaging with clients, Architects, and other stakeholders in both meetings and on site. * Excellent attention to detail and a commitment to producing high-quality, accurate design work. Profile (Desirable) * People management or team leadership experience. * Experience working across both domestic and commercial building services projects. * Familiarity with BIM workflows and collaborative design environments. * Membership of a relevant professional body (e.g. CIBSE, IET, or Engineering Council registration). Benefits * A leadership role in a purpose-driven company at the forefront of the UK's net-zero transition. * The opportunity to shape and grow the design function within a fast-scaling business. * Exposure to a diverse and expanding portfolio of renewable energy technologies. * Competitive salary and benefits package