Full job descriptionMobile Mechanical Engineer (Plumbing Bias)
Location: London & Home Counties
Salary: £45,000 + Overtime + Call-Out
Hours: Monday to Friday, 8:00am – 4:30pm
About the Company
A well-established and highly reputable building services contractor delivering mechanical, electrical, and maintenance solutions across London and the South East.
The business operates across a wide range of sectors including commercial, healthcare, education, retail, and public sector environments. They are known for providing high-quality service delivery, strong client relationships, and a professional, customer-focused approach.
Role Overview
We are seeking a Mobile Mechanical Engineer with a strong plumbing bias to deliver planned and reactive maintenance across a variety of client sites.
This role involves working across multiple locations, ensuring building services systems are maintained to a high standard, compliant with regulations, and operating efficiently.
Key Responsibilities
Maintenance & Service Delivery
*Carry out PPM and reactive maintenance on:
*Commercial and domestic plumbing systems
*Hot & cold-water systems
*Pumps, valves, pipework, and sanitary systems
*Heating systems and associated plant

*Diagnose faults and complete repairs effectively
*Support wider mechanical and M&E systems when required
*Ensure all work is completed to a high standard
Compliance & Safety
*Work in line with:
*Water Regulations & Legionella guidelines (L8 where applicable)
*Health & Safety standards

*Complete service reports, compliance documentation, and maintenance records
*Maintain strong attention to regulatory and compliance standards
Reactive Maintenance
*Attend breakdowns and emergency call-outs
*Identify root causes and implement long-term solutions
*Escalate major issues and support plant upgrades or replacements
Client Interaction
*Provide professional and customer-focused service
*Build and maintain strong client relationships
*Represent the business positively on-site
General Duties
*Travel across London & Home Counties (mobile role)
*Participate in call-out rota
*Maintain company vehicle, tools, and equipment
*Support minor install and project works when needed
Skills & Experience
*NVQ / City & Guilds in Plumbing or Mechanical Engineering
*Proven experience within building services or FM
*Strong fault-finding and diagnostic ability
*Experience working on commercial plumbing and heating systems
*Full UK Driving Licence
Desirable
*Legionella / L8 certification
*Basic electrical or HVAC knowledge
*Experience in commercial or public sector environments
What’s on Offer
*Competitive salary of £45,000
*Monday–Friday, 8:00am – 4:30pm (work-life balance)
*Paid overtime opportunities
*Call-out rota with additional earnings
*Company vehicle & fuel card
*Tools and uniform provided
*Ongoing training and development
*Stable, long-term contract portfolio
*Opportunity to work across diverse, high-profile sites
The Ideal Candidate
*Professional and reliable
*Strong attention to detail
*Customer-focused with good communication skills
*Self-motivated and able to work independently
*Takes pride in delivering high-quality work