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
Only candidates based in UK and eligible to work in UK are allowed