Critical Systems Lead Shift Engineer

Overview

Reporting into the CNI Manager for the operation and maintenance of Critical National Infrastructure Engineering Services across the National Energy Systems Operators (NESO) estate. The position is expected to take ownership and rectify incidents, planned maintenance activities, and reactives, ensuring compliance with all SLAs, KPIs, and site operating procedures. This is a senior level engineering role.

• Be part of a Critical National Infrastructure (CNI) support team, ensuring there is no disruption in the site’s critical services 24 hours a day, 365 days per year.
• Ensure all shifts are covered and the rota is kept up to date.
• Maintain weekly data collections (capacity reports, generator logs, etc.).
• Predominantly operate normal working hours, with the ability to cover the shift rota where gaps exist.
• Operate, maintain and repair critical MEP services in accordance with contractual maintenance standards.
• Proactively monitor, identify, diagnose and rectify faults using technical drawings and the Building Management System.
• Have qualified and detailed knowledge of electrical installation and testing regulations in accordance with the current BS 7671.
• Support the planning, delivery and implementation of new projects, refurbishment works and upgrades.
• Supervise contractors, including site induction, supervision, issuing Authority to Work, reviewing and approving risk assessments and method statements, and managing safe working practices.
• Monitor, repair and maintain Building Services equipment relating to heating, ventilation, lighting, air conditioning and refrigeration, LV switch gear and transformers, UPS systems, diesel generators and related distribution systems.
• Ensure all activities comply with statutory, regulatory, and industry standards, including health, safety, and environmental regulations.
• Liaise with the NESO client, providing technical reports, updates, and assurance of service delivery. Ensure client satisfaction through effective communication and service excellence.

WHAT WE ARE LOOKING FOR:

• Completed a time served electrical apprenticeship
• Must have completed the current BS7671 wiring regulations training
• Must be familiar with LPHW systems
• Permit to Work experience
• Experience of the control of contractors
• Full Car/Van Driving Licence
• Ability to be security cleared to a high level (SC)

• HNC in Building Services or other related discipline
• C&G 2391 electrical Testing and Inspection certificate
• Trend 963 qualification or equivalent
• IOSH Health and Safety Certificate
• HV/LV Authorised Person
• Confined spaces Authorised Person
• Knowledge of ACOP L8

• Regard safety of people and plant as a priority
• Ability to work effectively as part of a team and as an individual
• Ability to record work accurately, both on worksheets and computer-based systems
• Willingness to undertake further training
• Willingness and ability to participate in task audits, near-miss reporting, and plant audits

Our benefits and recruitment information follow in the section below.

Since 1987, Mitie’s 80,000 employees have been maintaining companies globally. We are the UK’s leading facilities management and professional services company, and our clients range from household names in banking, critical government sites as well as hospitals and schools.

Our market-leading offering provides benefits that suit your lifestyle, including a virtual GP, financial wellbeing support, and access to a flexible lifestyle benefits platform. We offer various holidays, insurance options, mortgage and savings schemes, and a range of discounts, cycle-to-work schemes, and life cover. We also provide training and development opportunities to support career progression. If you require any reasonable adjustments during the recruitment process due to disability or long-term conditions, please let us know by emailing Divya Madaan at

Join our Mitie Team. Together our diversity makes us stronger.