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:
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Extensive experience on National Grid transmission projects
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National Grid Competent Person (NSI 6 & 8)
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SSSTS, SMSTS or IOSH Managing Safely
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CSCS Supervisor and First Aid trained
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CITB Temporary Works Supervisor or Coordinator
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HSG47 and Impressed Voltage awareness
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Strong background in electrical supervision within the T&D sector
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Previous SR163 or TP137 appointment
Desirable:
HNC/HND in Electrical Engineering, formal electrical training, IOSH Environmental or equivalent