This is a full-time hybrid position for an Air Source Heat Pump Commissioning Engineer (Domestic New Build), covering Northamptonshire and the surrounding counties. The role focuses on commissioning air source heat pump systems across domestic new-build developments, ensuring every installation meets industry standards and performs efficiently from day one. Day-to-day, you ll be responsible for system testing, fault-finding, and resolving technical issues, working closely with installation teams to ensure smooth handovers. You ll also liaise directly with clients, providing clear updates and maintaining high levels of customer satisfaction throughout the commissioning process. Key Skills and Experience Proven experience in commissioning heating or renewable energy systems, ideally air source heat pumps Strong background in system testing and electrical testing Confident in fault-finding, diagnostics, and technical problem-solving Experience working as a Commissioning Engineer within renewables or building services Technical background in electrical engineering or a related discipline Clear communicator, comfortable working with clients and internal teams Flexible approach to work, with the ability to operate both on-site and remotely Good understanding of health and safety, compliance, and industry standards Full UK driving licence preferred for site-based work and travel