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Fire Systems Commissioning Engineer

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Overview of the role

Whether you are specialising in Fire & Security, Electrical, Mechanical, or Systems Engineering, your role at G4S is about precision and reliability. You will be responsible for the installation, maintenance, and technical support of critical assets that keep our communities and businesses operational and secure.

Joining G4S means joining a team where your technical expertise directly contributes to the safety and security of the places we work and live.

Core responsibilities

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Problem solving

Diagnosing complex technical faults and identifying the most efficient, long-term solutions while adhering to strict SLAs and KPIs.

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Compliance & Safety

Working to the highest Health & Safety standards, ensuring all works meet regulatory requirements and site-specific policies.

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Documentation

Maintaining accurate, real-time technical records and reports via PDA or service management systems to provide transparency to our clients.

Fire Systems Commissioning Engineer

Belfast, United Kingdom

Job ID : 8191
Job category : Engineering
Location : Belfast, United Kingdom
Date posted : 02/02/2026
Closing date : 31/07/2026


Commissioning Engineer

We have an exciting opportunity to join our Belfast team as a Commissioning Engineer. We are looking for someone to successfully undertake the commissioning of high end addressable fire and associated fire safety systems in a wide variety of applications throughout the United Kingdom

What you will be doing

  • To primarily undertake the commissioning of modern bespoke Addressable Fire Detection and Alarm Systems, Refuge Alarm Systems & Associated Systems as scheduled by our Regional Installation Manager or Customer Support Centre throughout the UK.
  • The potential to undertake occasional service calls and out of hours call out – as scheduled by our Customer Support Centre.
  • Carry out small installation day works as necessary.
  • Ensure that programmed commissioning works are completed on time and within budget, and to a high standard in line with customer expectations.
  • Carry out on site training / demonstrations with consultants and end users.
  • Effectively manage your personal vehicle and vehicle stock.
  • Liaise with Customers at a local / site level.

What we are looking for

  • Experience of the following Systems:
  • Gent by Honeywell Vigilon
  • Vigilon Voice product range
  • Baldwin Boxall Refuge System
  • Scope Paging Systems
  • Quantec System
  • GCSE /O Level or equivalent as a minimum).
  • Industry recognised Qualifications
  • Current base level site Health & Safety qualification ie ECS/CSCS/CSR card or equivalent.
  • At least 3 years experience in the commissioning of high end bespoke addressable Fire Detection & Alarm systems.

In return we offer

  • Competitive Salary, £35,000
  • Company Car
  • 25 days holiday
  • Pension/Life assurance

You will need to complete the following application form and one of our Recruiters will be in touch to discuss the next steps. Our recruitment and selection process will include an interview and screening to BS7858 standards.

Given the nature of the industry, we do need to ask some questions for security and compliance purposes, but don’t worry - you will only need to complete them once.

In 2021, G4S, a London-based global security company, was acquired by Allied Universal®, a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security solutions. This acquisition expanded Allied Universal’s footprint and infrastructure on a global and local level. Through a global workforce of approximately 800,000 people*, we leverage best practices in communities all over the world. With revenue of approximately $20 billion, we have the resources to deploy efficient processes and systems to help deliver our promise locally: keeping people safe so our communities can thrive. In Europe, we have an extensive network of offices and more than 46,500 employees to support our local communities and customers.  We believe there is no greater purpose than serving and safeguarding customers, communities and people in today’s world. Allied Universal is There for you™. For more information, please visit www.g4s.com or www.aus.com.

*Total workforce includes employees and subcontractors

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Success profile

It takes someone special to be a G4S Engineer. We are looking for engineers who take pride in their craft and are committed to continuous learning. Our successful engineers share these core traits:

  • Technical excellence
  • Analytical mindset
  • Adaptability
  • Quality focused
  • Strong communication skills
  • Reliable

Career path

As a G4S Engineer, you are part of a global team that values your technical expertise. Our Engineering positions offer a range of opportunities to support the personal and professional development of our teams. We invest in your technical growth, providing the pathway for you to move from a specialist technician into senior operational leadership.

Engineer/ Technician Lead Engineer/ Qualifying Supervisor Technical Operations Manager Account/ Contract Manager Head of Engineering/ Regional Director

Rewards and benefits

Our benefits vary from country to country and role to role and are designed to ensure our staff have access to the things they need to thrive both in and out of work. This includes on-the-job training, career paths to management and a range of benefits depending on locations around the world.

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Training & Development

We continually invest in the training and development of our employees so that they can reach their full potential.

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Rewarding compensation

Competitive base salary with opportunities for overtime and on-call allowances.

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Promote from within culture

At G4S we pride ourselves on fostering a promote from within culture.

More about G4S