

Designs, installs, commissions and maintains fire protection, life safety and security systems.
Key duties include delivering planned fire system installs and commissions, communicating updates and technical insights to customers, performing remedial and small installations per service guidance, and maintaining accurate service records.
You will work with fire alarm systems from Gent, Notifier, Advanced, Protec and other open‑protocol platforms, installing and commissioning to the relevant British Standards.
The ideal candidate has experience installing and commissioning fire alarm systems to British Standards, strong diagnostic and problem‑solving abilities, excellent communication and customer service skills, basic electrical safety training (ECA) and a solid understanding of building services.
Successful candidates must undergo required security vetting, and employment offers are subject to satisfactory vetting results.
Trinity Fire & Security Systems is hiring a Fire Alarm Works Engineer in London, offering a competitive industry salary plus enhanced overtime. The role involves high‑quality installation and commissioning across the client portfolio, ensuring system integrity and regulatory compliance. You will carry out scheduled installations, commissions and small works, supported by a skilled regional team, administrators and technical specialists.
The position provides regional work for better work‑life balance, uncapped commission, and enhanced overtime that reward effort. Ongoing training is delivered with leading brands such as Gent, Notifier, Protec and Baldwin Boxall, and there are clear pathways for long‑term career progression.
Trinity offers a competitive base salary with uncapped commission and paid overtime, 23 days’ holiday (increasing with service) plus bank holidays, a company vehicle and fuel card, an employee discount programme across 800+ retailers, pension via Royal London, life assurance, an employee assistance programme, and a referral bonus up to £2,000.