Senior Mechanical Design Engineer - MEP Building Services

Client: My client has over 35 years in the building services industry and have grown into a turnkey Principal Contractor providing a comprehensive range of in-house services, with annual turnover expected to reach £85 million. This growth has been built on long-term client relationships, a flexible approach to service delivery, and a commitment to understanding each client's unique requirements. As the business has expanded its capabilities and regional presence, it has continued to focus on the principles that have shaped its success: prioritising safety, maintaining high standards of quality, acting with integrity, and investing in its people. They are now looking for a Senior Mechanical Design Engineer to join the London team.

Role: Senior Mechanical Design Engineer - £70,000 + Benefits

The successful candidate will join a growing internal design team, expanding in response to a strong pipeline of new project wins across multiple sectors. Working within a collaborative multidisciplinary environment to deliver innovative building services solutions from concept design through to detailed design and construction support.

This role offers the opportunity to work on a diverse portfolio of projects, including commercial developments and cutting-edge data centre schemes. Whether you already have data centre experience or are looking to develop expertise in this rapidly growing sector, you will be supported by experienced professionals and gain exposure to technically challenging, high-profile projects.

The team is committed to delivering sustainable, energy-efficient, and technically excellent designs, providing an excellent platform for career development and progression within a supportive and collaborative environment.

Role & Responsibilities

· Client liaison to develop relationships and offer support to achieve ‘trusted advisor’ status.

· Assistance in the assessment of new works and fee submissions.

· Provide technical support to wider delivery business through Stage 5 development of working drawings and technical review/approval of technical submittals to ensure they remain aligned with the Stage 4 design intent and our CPD responsibilities.

· Develop and produce all necessary Mechanical calculations and design solutions from briefing stage through to detailed design stage.

· Monitor and assist with construction works as they progress on site in respect of compliance and high-quality standards set by the business.

· Lead and run key testing and commissioning activities such as ISTs and Black Building Tests.

· Undertake technical appraisals of existing buildings to develop short and long term development strategies, which will include:

· Energy Performance Assessments.

· Load and Capacity reviews.

· Life Cycle Replacement Reports.

· Single Point of Failure Analysis (SPOF)

· Resiliency reviews.

The Ideal Candidate

• 6+ years' experience within Mechanical Building Services Design.
• HNC, HND, Degree, or equivalent qualification in Building Services Engineering or a related discipline.
• Strong technical knowledge of HVAC and mechanical building services systems.
• Experience working within a building services consultancy environment.
• Proficient in Revit, BIM, and industry-standard design software.
• Strong communication and stakeholder management skills.
• A proactive, collaborative, and forward-thinking attitude.

In Return They Offer

• A healthy and diverse pipeline of work across Data Centres and Commercial sectors.
• Exposure to innovative and sustainability-focused projects.
• Genuine opportunities for career progression and professional development.
• The chance to work on technically challenging and high-profile developments.
• The opportunity to join a growing business with an excellent reputation within the industry.

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