Mechanical Commissioning Engineer London Data Centre We are currently partnering with a bespoke Fire, Security and IT Solutions design, installation and support provider operation on Major Construction and Mission Critical projects across Europe. Due to continued success, they are seeking a Mechanical Commissioning Engineer to join them on a Data Centre Project in London. Responsibilities Commissioning Planning & Execution Develop and implement detailed commissioning plans and procedures for mechanical systems, ensuring compliance with project specifications, quality standards, and client requirements. System Testing & Validation Carry out and witness pre-functional checks, start-up activities, and performance testing of systems including chilled water, CRAC/CRAH units, ventilation, and fuel oil systems, ensuring readiness for integrated systems testing. Technical Coordination Coordinate commissioning activities with design, construction, electrical, and controls teams, maintaining clear communication to ensure smooth sequencing and alignment across disciplines. Documentation & Reporting Prepare and maintain commissioning documentation, test records, and progress reports; ensure all commissioning deliverables are accurate, traceable, and aligned with QA/QC requirements. Issue Resolution & Quality Control Identify, track, and close out commissioning issues or deficiencies through structured reporting and collaboration with site teams and the clients commissioning authority. Safety & Compliance Leadership Ensure all commissioning works are executed in line with health and safety procedures, permits, and risk assessments; promote a strong safety culture within the commissioning team. Requirements Must have relevant degree level qualification or equivalent trades background Must have 5 years experience in a similar position on large scale construction projects (preferably Data Centres) Must be based within commutable distance of London Benefits £70,000 - £80,000 Benefits