We are seeking a freelance Senior Site Agent with proven experience in shaft sinking and tunnelling works to join our delivery team on a complex infrastructure project in Snowdonia. This role suits a hands-on, site-focused senior agent who can take ownership of all aspects of project delivery — from planning and resourcing through to completion — ensuring the works are delivered safely, efficiently, and to a high technical standard. Key Responsibilities * Take full responsibility for day-to-day project management of shaft sinking and tunnel works. * Manage site operations, workforce, and subcontractors to ensure programme, safety, and quality targets are met. * Plan and coordinate construction sequences, equipment mobilisation, and logistics. * Maintain clear and proactive communication with the client, designer, and internal teams. * Monitor and report on progress, cost control, and resource forecasting. * Oversee HSE compliance, CDM requirements, and environmental controls. * Drive performance, problem-solve on site, and ensure delivery within agreed timelines. * Produce short-term lookahead programmes and contribute to project reporting. Essential Requirements * Minimum 8–10 years’ experience managing tunnelling and/or deep shaft construction projects. * Strong background in temporary works, geotechnical interfaces, and confined-space operations. * Proven record of leading site teams and delivering to tight deadlines. * Good working knowledge of NEC contract principles (Option A or C preferred). * Excellent communication and organisational skills. * CSCS (Manager Level) and SMSTS qualifications. * Full UK driving licence and flexibility to work in remote site conditions. * Eligible to work on a CIS / self-employed basis. If this Role Sounds of interest please apply and one of our team will be in touch