Frontline Supervisor

This role supports Costain for the Reactor Height Reduction Project at Nuclear Restoration Services (NRS) Trawsfynydd Site, based in North Wales. The 3.5 year project will involve the partial demolition of each RB’s, reducing the overall height and reducing the current asset management liability. In addition, an extensive package of civil new build and remedial works will be delivered prolonging the durability of the retained structures. This challenging and exciting project, which includes a wide supply chain, will significantly reduce the uncertainty associated with the current condition of the reactor buildings and lessen the visual impact caused by the Reactor Buildings on the Snowdonia National Park.

At Costain, we believe diverse perspectives drive innovation. If you’re passionate about making a positive impact and think you can bring value to our team, we’d love to hear from you—even if you don’t tick every box. Your unique skills and experiences could be exactly what we need.

Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company.

We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements. We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets:

• Future-shaping strategic consultancy
• Consultancy and advisory
• Digital technology solutions
• Asset optimisation
• Complex programme delivery

Our culture and values underpin everything we do. Costain appreciates the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase. We do share individual feedback following an interview.

A Disability Confident employer will generally offer an interview to any applicant that discloses they have a disability and meets the minimum criteria for the job as defined by the employer. It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people.

Essential qualifications:

• IOSH or NEBOSH Managing Safely or equivalent
• CSCS Supervisor Gold or black card
• SMSTS or SSSTS or equivalent

Undertaking Front Line Supervisor duties to ensure our Sub Contractors are working safely and ensuring the supplied resource are qualified in their roles (SQEP). Responsibilities include:

• Producing and disseminating Pre job briefs
• Accurate record keeping for daily logs
• Delivering accurate pre job briefs to the Sub Contractors and attendance at the workfaces
• Keeping accurate daily logs
• Collection of work packs for each task from the Safe System of Work Controllers
• Ensuring the Sub Contractor are working safely in line with the approved RAMS
• Checking of SQEP records
• Liaising with the client representative to ensure work packs are approved and programmes are being met
• Attendance and presentation of progress at weekly meetings

Skills required:

• Essential: Basic IT skills (Word/Excel)
• Full Driving License
• Ability to achieve security clearance (SC/DV)
• Previous Supervisory experience
• Risk assessment awareness

• Desirable: Demolition experience
• Decommissioning experience

Full time

Posting Date: 2026-06-25