Senior mechanical design engineer

Senior Mechanical Design Engineer
Location: Central London (3 days office, 2 days home) Salary: Up to £70,000 depending on experience Type: Permanent, full-time Travel: Approximately once per month to project sites across Europe
The Opportunity
Our client is an established building services design consultancy based in Central London. Operating as a deliberately tight team, they have built a reputation for delivering quality over volume.
The mechanical desk is growing carefully, with a focus on hiring senior engineers who can run their own projects, lead client relationships, and shape the direction of the practice as it scales.
This is a senior-level hire for a mechanical engineer who has outgrown the cog-in-a-machine feel of a larger consultancy and wants visible impact on the design, the clients, and the business.
Key Responsibilities
Lead the mechanical design on live projects from concept through to completion across all RIBA stages
Act as the primary point of contact for clients on assigned projects, building and maintaining long-term relationships
Attend client meetings, present mechanical design solutions, and represent the consultancy externally with confidence and authority
Produce and review mechanical calculations, drawings, schematics, and specifications, ensuring technical accuracy and compliance with current regulations and CIBSE guidance
Design and specify HVAC systems, heating, ventilation, cooling, public health, and renewable technologies including heat pumps and low carbon solutions
Manage project deliverables, timelines, and quality on behalf of the client, ensuring expectations are met or exceeded
Travel to European project sites approximately once per month to support delivery and client engagement
Liaise directly with architects, contractors, electrical engineers, and the wider design team on behalf of the client
Provide technical leadership and mentor junior mechanical engineers as the desk grows
Contribute to fee proposals, bid responses, and business development activity where appropriate
Stay current with industry developments in sustainability, decarbonisation, and Part L compliance
Uphold the consultancy's reputation for technical excellence and client service at every stage of the project
About You
Proven experience as a Mechanical Design Engineer within a UK building services consultancy environment
Strong technical design capability across HVAC, heating, cooling, ventilation, and public health systems
Working knowledge of current Building Regulations, CIBSE design guides, and relevant British Standards
Comfortable with mechanical design software such as Hevacomp, IES, or similar industry-standard tools
Confident client-facing communicator, able to lead meetings and present design rationale to non-technical stakeholders
Commercially aware, with an understanding of fee management, programme constraints, and client expectations
Willing and able to travel to European project sites on a monthly basis
UK right to work
Chartered or working towards chartership (IEng, CEng, MCIBSE) is desirable
Exposure to sustainability and low carbon design, including heat pumps, decarbonisation strategies, and Passivhaus principles, is advantageous
You will thrive in this role if you want autonomy, technical ownership, and the chance to grow alongside a small team that values quality engineering, direct client engagement, and visible impact.

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