Petrofac Limited is a British international energy services company that designs, builds, manages and maintains oil, gas, refining, petrochemicals and renewable energy infrastructure, and trains the people who support them. It operates in a range of markets from design to decommissioning. It is registered in Jersey, with its main corporate office on Jermyn Street, London. It has 7,950 employees across more than 30 offices globally. It was for a time in the FTSE 100 Index. In October 2025 the Petrofac holding company filed for administration. Wikipedia