Mechanical Commissioning Manager in City of London

Mechanical Commissioning Manager £450-£600 per day DOE | CIS or Ltd Mechanical Contractor | Residential, Commercial & Mission-Critical Projects We're recruiting a Mechanical Commissioning Manager on behalf of a £30m turnover mechanical contractor with a track record of delivering residential projects valued at up to £20m. The business has recently secured work in the commercial and mission-critical sectors and is looking for someone to lead mechanical commissioning across its growing project portfolio. You'll take ownership of commissioning from planning and installation readiness through to integrated systems testing and client handover. You'll be the main point of contact for commissioning, working with site teams, consultants, main contractors, clients and specialist subcontractors to keep testing on programme and resolve issues ahead of handover. What you'll be doing Develop commissioning plans, programmes and trackers, chair readiness meetings and flag risks to key milestones. Inspect mechanical installations against project specifications and approved technical submissions, working with site teams to close out defects before testing. Manage and witness mechanical pressure testing, and coordinate flushing, cleaning, filling, dosing and water treatment. Oversee plant start-up, functional and performance testing, and coordinate consultant and client witnessing. Coordinate BMS and controls commissioning, including point-to-point checks, plant sequencing, alarms and system integration. Work with life safety specialists on wet risers, sprinklers and smoke extract systems. Review RAMS and test procedures, witness integrated testing and verify that system interfaces have been tested and documented. Manage commissioning records, certification and final reports. Support the production of O&M manuals and coordinate client demonstrations, training and handover. What we're looking for A relevant mechanical qualification. A minimum of five years' experience as a Commissioning Manager (Cx Manager). Experience managing mechanical building services commissioning on sizeable projects, from planning and pre-commissioning through to handover. A strong understanding of mechanical testing, BMS and controls, and interfaces with life safety systems. Experience coordinating specialist subcontractors and managing consultant and client witnessing. The ability to manage commissioning programmes, spot risks early and drive defects through to close-out. Residential, commercial or mission-critical project experience would be relevant to the role