True are partnering with a respected and growing principle contractor specialising in low-carbon energy solutions and retrofit projects across the UK & Ireland. With a new library decarbonisation scheme now secured, they’re looking to appoint a Site Manager to oversee the full mechanical package on this flagship retrofit project. As Site Manager, you’ll be responsible for coordinating subcontractors and site teams, managing health & safety compliance, and ensuring mechanical installations are delivered to the highest quality. You’ll oversee the day-to-day running of the project, working closely with project managers, engineers, and clients to deliver on programme, budget, and performance targets. This is a hands-on role requiring strong technical oversight, excellent organisational skills, and the ability to drive standards on site. You’ll play a key role in ensuring this high-profile public-sector retrofit meets both decarbonisation goals and operational requirements. Site Manager Package: * £65,000 (DOE) * Car / travel allowance * 25 days holiday bank holidays * Pension scheme * Long-term pipeline of energy and decarbonisation retrofit projects * Professional development and training opportunities We’re looking for someone with: * Strong background delivering mechanical building services installations (HVAC, heating, pipework, controls) * Previous site management experience within retrofit or decarbonisation projects (public buildings preferred) * Proven track record managing subcontractors and trades on site * Excellent knowledge of health & safety, with SMSTS and CSCS qualifications * Ability to run site operations independently while liaising with clients and project managers * Strong organisational and communication skills Desirable experience: * Delivery of low-carbon retrofit projects (libraries, schools, leisure centres, or similar public-sector schemes) * Knowledge of heat pumps, district heating, or other renewable/energy efficiency technologies