M&E Manager

M&E Manager – HV Substation (Wymondley, SG4) Location: Wymondley 400kV Substation, Hertfordshire Rate: £500 per day (subject to review when stepping into SR163 Site Manager role) Contract Type: Full-time, site-based, contract Duration: 6-month (part of an 18-month programme - high probability of extension) Hours: Monday to Friday, 10-hour days with occasional weekends IR35 Status: Outside IR35 MRR Infrastructure is supporting the delivery of a major 400kV substation build as part of the UK’s National Grid transmission infrastructure. This global engineering-led consultancy is a key delivery partner across multiple National Grid frameworks, known for its safety-first approach and commitment to technical quality. We are seeking an experienced M&E Manager to lead the mechanical and electrical workstreams on site. This position will initially support the Site Manager in day-to-day delivery and supervision, with the expectation to step into the SR163 Site Manager role as the project progresses. This is a critical, high-visibility role requiring hands-on coordination of subcontractors, proactive oversight of compliance and programme progress, and a focus on delivering to National Grid’s standards of safety, quality and reporting. Essential Qualifications & Experience: * Extensive experience on National Grid transmission projects * National Grid Competent Person (NSI 6 & 8) * SSSTS, SMSTS or IOSH Managing Safely * CSCS Supervisor and First Aid trained * CITB Temporary Works Supervisor or Coordinator * HSG47 and Impressed Voltage awareness * Strong background in electrical supervision within the T&D sector * Previous SR163 or TP137 appointment Desirable: HNC/HND in Electrical Engineering, formal electrical training, IOSH Environmental or equivalent