Commissioning ManagerDepartment: DesignReports to: Director of Design Technology and Innovation Job Location: Corsham / Farnborough / LondonPosition Type: Full-Time / Regular Job PurposeThe Commissioning Manager is responsible for coordinating, planning, and overseeing the witnessing of commissioning activities across data centre projects. This includes ensuring high technical standards are maintained and evidenced with robust documentation and data. Key Responsibilities and DutiesDefine the scope for and manage third-party commissioning agents (CxA) and managers (CxM).Ensure commissioning witnessing activities occur and that high-quality documentation and evidence are produced.Attend design coordination meetings (Stages 3 and 4) to guide on commission ability and help shape the commissioning approach.Own, update and manage internal commissioning standards, processes, and document approvals.Oversee Integrated System Testing (IST) and sign off completion certificates with key stakeholders.Spot witness earlier commissioning stages and fully witness Level 5 IST.Arrange and lead SOP and EOP workshops, commissioning presentations, and client witnessing sessions.Collaborate on and approve electrical test plans, QA processes, load bank and power quality monitoring plans, and thermal imaging scope.Lead lessons learned workshops post-IST, and coordinate root cause analysis (RCA) production and wider distribution for failed tests.Review new or proposed customer contracts to identify an