Company: Balfour Beatty plc
Location: Potters Bar
Posted: May 4th, 2026
Join Connect Plus Services as a Tunnels Maintenance Technician and play a key role in maintaining the safety, reliability, and performance of tunnel infrastructure across the M25 network. In this technically focused role, you will support the operation of M25 tunnels by delivering planned and reactive maintenance across electrical, electronic, mechanical, and building systems. You will operate under the direction of the Tunnel Maintenance Manager and Supervisors, contributing to the upkeep of critical assets under normal and emergency conditions. This role is suitable for a skilled and safety-conscious technician who contributes to network resilience.
This role is based from CPS Hatfield and South Mimms Depots, with regular work across the M25 tunnel network and occasional travel to other locations. You will attend incidents, support planned maintenance, and participate in standby and callout rota for Holmesdale, Bell Common, and Hatfield tunnels. A full UK driving licence is required, and you must be willing to work in confined spaces, at height, and in operational tunnel environments.
You will demonstrate strong customer service, professionalism, ability to work under pressure, clear communication, teamwork, and a strong commitment to safety. You will have completed a recognised electrical apprenticeship and hold qualifications such as City and Guilds Level 3 and the 18th Edition. Authorised Person status is desirable, with training provided as needed. You will hold or be willing to obtain certifications in MEWPs, confined spaces, inspection and testing (C&G 2391), and CSCS or ECS; support to qualify as an Approved Person under the BB Electrical Safe System of Work for HV and LV activities. You will bring experience in fault finding from schematic drawings and broad exposure to electrical, electronic, and mechanical maintenance; pump maintenance is an advantage. Knowledge of current health and safety legislation and ability to carry out electrical installation work to regulations are required. Previous experience in road tunnels or building maintenance is beneficial.
Connect Plus Services (CPS) brings together the collective strength of our parent companies - Balfour Beatty, Atkins and Egis Road Operation UK. With around 600 people, based at eight locations across the M25 network, we work on behalf of Connect Plus and National Highways to manage the operation of the M25 24 hours a day, 365 days a year, from routine maintenance to managing the whole-life requirement of thousands of assets across the network.
At Balfour Beatty we believe that diversity and inclusion are essential components of any successful, happy workplace. Through our Value Everyone Diversity and Inclusion Strategy and Action Plan, we are growing our diverse workforce and developing our inclusive culture where everyone is able to thrive and reach their full potential, regardless of their identity or background. To find out how we are making this a reality, visit balfourbeatty.com/diversityandinclusion. We are members of WISE, enei, Business Disability Forum and the Association for Black and Minority Ethnic Engineers (AFBE). We are committed to delivering inclusive recruitment and supporting applicants with disabilities.
As a Disability Confident Employer, we are committed to working with people who have disabilities and long-term health conditions to remove barriers to employment. We are also committed to offering applicants with a disability an interview if they meet the minimum requirements for the role. For more info, visit the Disability Confident campaign page.
We are always looking to improve our resourcing process and welcome feedback at candidaterecruitmentqueries@balfourbeatty.com
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