The posting
Job Title: Mobile Commercial Gas Engineer Location: Central & Greater London (within the M25) Job Type: Permanent Hours: 8:00am – 5:00pm Salary: £48,000 – £55,000 Overtime: Time and a half or double time + £150 standby allowance Call-Out Rota: 1 in 7 weeks Reporting to: Operations Manager
Overview
Valoris Group is looking for a skilled Mobile Building Services Engineer with a strong commercial gas bias to join a well-established HVAC and building services provider. This is a key role within the service delivery and operations team, responsible for maintaining, fault-finding, and improving mechanical and gas systems across multiple commercial sites throughout London and the Home Counties.
This mobile position requires flexibility and a proactive approach, including occasional work outside standard hours to support essential services.
Role Responsibilities
- Lead gas and mechanical maintenance, fault diagnosis, and compliance across commercial sites
- Carry out planned preventative maintenance (PPM) and reactive works on boilers, plant rooms, and associated equipment
- Attend multiple sites as directed to meet operational requirements
- Respond promptly and safely to breakdowns and emergency callouts
- Maintain accurate documentation, including service reports and gas safety records
- Provide clear on-site technical updates and recommendations
- Follow and promote all health and safety and gas compliance standards
- Continue developing technical skills and knowledge of new technologies
Key Tasks
- Planned, reactive, and statutory maintenance on commercial boilers, heating systems, pumps, valves, and plant equipment
- Fault finding, isolation, and repair of gas and mechanical systems
- Testing, purging, and commissioning in line with Gas Safe regulations
- Support installation works, upgrades, and plant refurbishments
- Complete service and safety certification accurately and on time
- Provide basic multi-skilled support across electrical, HVAC, and plumbing systems where required
- Attend and resolve gas or mechanical emergencies across sites
Benefits
- Competitive salary based on qualifications and experience
- Overtime at enhanced rates plus standby allowance
- 25 days annual leave plus 8 bank holidays
- Salary protection through sickness and accident cover
- Life assurance (2x annual salary)
Health & Wellbeing
- Access to a private GP service
- Confidential Employee Assistance Programme (24/7 support)
- Annual eye care reimbursement
Training & Development
- Access to a structured training academy and mentoring support
- Ongoing opportunities to enhance technical skills and qualifications
Equipment Provided
- Company van and fuel card
- Uniform and safety equipment
- Phone and tablet
- Parking apps and company debit card
Candidate Requirements:
Essential Experience
- Proven experience in commercial gas maintenance and HVAC plant environments
- Strong fault-finding, repair, and commissioning experience on commercial gas systems
- Experience delivering both PPM and reactive maintenance
- Ability to work independently across multiple sites
Essential Qualifications
- Commercial Gas certifications (COCN1, CODNCO1, CIGA1, CORT1, ICPN1, TPCP1A or equivalent)
- NVQ Level 3 in Mechanical Engineering or equivalent practical experience
- Full UK driving licence
- Right to work in the UK
Desirable Qualifications
- Domestic gas qualification (CCN1)
- F-Gas or general HVAC awareness
- Electrical qualification (18th Edition or similar)
- IPAF and/or PASMA
Skills & Abilities
- Strong diagnostic and problem-solving capability
- Ability to read mechanical drawings and plant schematics
- Good communication and reporting skills
- IT literate and confident using mobile devices and job management systems
- Able to work both independently and as part of a team
Personal Attributes
- Reliable and committed to high-quality workmanship
- Flexible and adaptable to changing work demands
- Professional and customer-focused approach
- Strong team player with a collaborative mindset
Physical Requirements
- Physically fit and able to lift equipment
- Comfortable working at height and in confined spaces
- Willing to travel across multiple locations and participate in an on-call rota
Health & Safety
- Strong understanding of gas safety regulations and compliance standards
- Commitment to safe working practices
- Proactive in identifying hazards and managing risks



