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Primarily London-based client sites,Participate in the on-call rota (currently 1 week in every 8)Commission and certify Fire Alarm and AOV (Automatic Opening Vent) systems Job Title: Fire Alarm & AOV Commissioning Engineer Location Primarily London-based client sites, with nationwide travel and occasional overnight staysOverview We are recruiting for an experienced Fire Alarm & AOV Commissioning Engineer to join a growing life safety business. This is a hands-on role working across client sites, delivering planned commissioning works and responding to emergency callouts when required. The successful engineer will be confident working independently, managing deadlines, and ensuring systems are commissioned safely, compliantly, and to the highest standards.A strong technical understanding of fan motors, inverters, and detection systems is essential, along with the ability to work across multiple disciplines in live environments.Key Responsibilities Commission and certify Fire Alarm and AOV (Automatic Opening Vent) systemsParticipate in the on-call rota (currently 1 week in every 8)Develop, document, and verify accurate cause & effect strategiesProgram, test, and fault-find life safety systemsRead, interpret, and work from technical drawings and site mark-upsLiaise closely with Design, Project Management, and Maintenance teamsComplete all associated project administration, including timesheets, vehicle checks, and expensesFinalise commissioning documentation and sign off project certification Requirements Proven fire alarm commissioning experience to BS 5839 standardsExperience with advanced life safety systems (desirable but not essential)Previous on-site installation and/or commis