A well-established and highly regarded main contractor is seeking an Assistant Site Manager to join their growing team immediately. This is an urgent requirement due to a strong pipeline of live and upcoming projects across multiple sectors. You will be working across a diverse range of schemes in London, including residential, commercial, and mixed-use developments, supporting the delivery of high-quality construction projects from start to finish. Key Responsibilities Support the Site Manager in the day-to-day running of site operations Coordinate subcontractors and ensure works are delivered safely, on time, and to specification Maintain site health & safety standards in line with regulations and company policy Assist with site inductions, toolbox talks, and progress reporting Monitor quality control and ensure compliance with project drawings and specifications Liaise with clients, consultants, and internal project teams Help drive programme delivery and resolve on-site issues efficiently Requirements Previous experience in a similar Assistant Site Manager or Site Supervisor role Background working with a main contractor (essential) Strong knowledge of site health & safety procedures Ability to manage multiple trades and maintain programme targets Excellent communication and organisational skills SMSTS, CSCS, and First Aid (preferred or working towards) What's on Offer Immediate start opportunity Work with a respected, long-established contractor Exposure to a variety of interesting and high-profile projects Clear progression opportunities within a growing team Competitive salary and benefits packageIf you are a proactive and motivated construction professional looking to take the next step in your career, we want to hear from you urgently