Commercial Combustion EngineerSouth UK - M25 corridor, Central London and wider South East£40,000 to £50,000 DOE + van + benefitsFull time PermanentPearson Whiffin Recruitment is working with a well-established building services contractor to recruit an experienced Commercial Combustion Engineer to join their growing team. This is a mobile role covering sites across the South of England, typically within the M25 corridor but with work further afield as required, including Central London. You will support a diverse portfolio that includes leisure centres, schools, garages and car showrooms.The roleYou will carry out planned and reactive works on commercial heating and hot water systems across a varied site base. This position requires someone confident working independently, managing workloads and resolving issues without reliance on close supervision. While autonomy is essential, you will have access to a technical helpline and support from management when needed.Duties• Servicing, maintaining and repairing commercial boilers and plant• Diagnosing faults on gas fired systems and carrying out effective repairs• Testing, commissioning and setting up commercial heating equipment• Working on burners, pressurisation units, gas safety systems and associated controls• Carrying out commercial gas safety checks and completing the required documentation• Handling reactive breakdowns and ensuring safe restoration of systems• Advising clients on performance, efficiency and recommended re