Criterion Capital is seeking a skilled and reliable Plumber / HIU Engineer to support our portfolio of residential PRS buildings across Central London. This is a fantastic opportunity to join a growing in-house maintenance team that plays a vital role in keeping our homes safe, functional, and comfortable for our residents. ?️ The Role You will be responsible for planned and reactive plumbing works, with a strong focus on HIU (Heat Interface Unit) systems, across our residential sites. From routine maintenance to emergency call-outs, you'll ensure systems are operating efficiently and residents receive excellent service. ? Key Responsibilities Carry out maintenance, servicing, and repairs on plumbing systems, including HIUs Diagnose and resolve faults promptly across residential apartments and communal areas Conduct inspections and testing in line with regulations and safety standards Work alongside the wider engineering and maintenance team to deliver a high-quality service Maintain accurate records of work completed and materials used Support with general building services and occasional weekend cover, if required ✅ About You NVQ Level 2/3 in Plumbing or equivalent Demonstrated experience working with HIU systems in residential or commercial environments Good understanding of hot water and heating systems in multi-unit buildings Excellent problem-solving skills and ability to work independently Strong customer service focus and professional communication Full UK driving licence is a plus but not essential