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Service, maintain, and fault-find Fire Alarm and AOV systemsDiagnose and rectify system faults efficiently and safelyComplete accurate service reports and certification Job Title: Fire Alarm & AOV Service Engineer Location London & Greater London(Occasional travel outside London may be required) SalaryUp to £50,000 per annum (depending on experience)Plus overtime, call-out, company vehicle, and full benefits packageOverviewWe are recruiting for an experienced Fire Alarm & AOV Service Engineer to join a well-established and growing life safety business operating across London. This is a field-based service role, focused on the maintenance, fault-finding, and repair of fire alarm and Automatic Opening Vent (AOV) systems across commercial and residential client sites.The successful engineer will be technically strong, customer-focused, and comfortable working independently in live environments, ensuring all systems remain compliant and fully operational.Key Responsibilities Service, maintain, and fault-find Fire Alarm and AOV systemsDiagnose and rectify system faults efficiently and safelyCarry out routine and reactive maintenance visitsRespond to emergency callouts as part of the on-call rotaComplete accurate service reports and certificationLiaise professionally with clients, site contacts, and internal teamsEnsure all works comply with relevant British Standards and company proceduresMaintain company vehicle, tools, and test equipment Requirements Proven experience servicing Fire Alarm systems to BS 5839Experience working on AOV systems (essential)Strong fault-finding and problem-solving skillsPrevious field-based service engineering exp