Mechanical Building Services Engineer

First Military Recruitment Ltd; London; Hybrid; GBP 55,000; Full time

Job summary

A leading recruitment agency is seeking a Senior Mechanical Building Services Engineer to lead projects focused on refurbishment and decarbonisation of existing buildings in London. The ideal candidate will have substantial experience in mechanical design, stakeholder management, and a strong commitment to sustainability initiatives. This hybrid role offers the opportunity to work on innovative engineering solutions while supporting the development of junior staff in a collaborative environment.

Qualifications

• Actively pursuing chartership with IMechE or CIBSE preferred.
• Proven experience in mechanical design for existing buildings.
• Understanding of social housing sector challenges and compliance.

Responsibilities

• Lead mechanical engineering design for HVAC and renewable energy systems.
• Conduct condition surveys and lifecycle costing.
• Mentor junior engineering staff and manage contract administration.

Skills

Mechanical design

Project leadership

Technical report writing

Lifecycle planning

Stakeholder engagement

Decarbonisation analysis

HVAC systems

Education

Building Services Engineering qualification

Job description

LB395 – Mechanical Building Services Engineer

Salary: GBP55,000

Location: London / Hybrid

Overview:

First Military Recruitment are currently seeking a Senior Mechanical Engineer on behalf of one of our clients.
This role focuses on the refurbishment, upgrade and decarbonisation of existing buildings, and requires a practical, client–facing engineer who thrives in both technical and on–site environments.
Our client encourages applications from ex–military personnel however all candidates will be given due consideration.

Duties and Responsibilities:

• Lead mechanical engineering design for projects involving HVAC, domestic water services, and renewable energy systems in existing buildings.
• Conduct condition surveys, asset assessments and lifecycle costing.
• Deliver decarbonisation analysis, energy audits and retrofit strategy development.
• Produce technical reports, specifications and feasibility studies.
• Undertake detailed engineering calculations to inform design and decision–making.
• Liaise with contractors, clients and stakeholders throughout the project lifecycle.
• Fulfil Contract Administrator duties including managing valuations, contractor performance and change control procedures.
• Apply knowledge of contract management.
• Conduct regular site inspections, oversee commissioning and support issue resolution.
• Collaborate closely with Electrical Engineers, Architects, Sustainability Specialists and Quantity Surveyors.
• Mentor and support the development of junior engineering staff.

Skills and Qualifications:

• Building Services Engineering qualification.
• Actively working towards chartership (IMechE or CIBSE preferred).
• Proven experience in mechanical design, delivery and project leadership on existing building projects.
• Familiarity with maintenance contracts, including performance monitoring and lifecycle planning.
• Experience writing and contributing to procurement documentation for public or private sector projects.
• Proficiency in writing technical reports, developing specifications, drawings, calculations and conducting feasibility studies.
• Extensive experience working within the social housing sector, as well as across a broad range of public sector environments. This includes a strong understanding of the specific challenges, compliance requirements, and stakeholder engagement needs associated with these settings, such as budgetary constraints, phased works in occupied premises and alignment with government or local authority frameworks and funding criteria.
• Experience in asset data collection, including on–site surveys to identify and log mechanical and electrical systems, capturing equipment condition, operational status and compliance with relevant standards to support lifecycle planning, maintenance strategies and investment decisions.
• Knowledge of construction risks, including how to identify and manage them effectively across project stages.
• Experienced in reporting resource and financial information to Partners and senior management, ensuring visibility on project performance and forecasts.
• Thorough understanding of building services systems including HVAC, hot & cold water and controls.