Petrofac has been awarded a £15million contract renewal with Oranje-Nassau Energie Resources (ONE) for the Sean gas field in the southern North Sea.
The firm will provide maintenance, engineering and asset management support for the normally unmanned installation over five years.
Sean lies 68 miles offshore, north-east of Lowestoft.
Netherlands-based ONE was a new entrant to the UK North Sea when it acquired a 50% stake in Sean in 2014.
Petrofac was shortly afterwards awarded the Duty Holder Support Services contract the following year.
Dave Blackburn, senior vice president, Petrofac Engineering and Production Services West, said: “We’re delighted that ONE has demonstrated continued confidence in our ability to create notable added value for them through the provision of effective integrated support services.
“The renewal of this important contract is testament to our teams’ competence and experience in the SNS.
“We look forward to continuing our focus on a safe and efficient delivery for our client as we work to extend the field life of Sean, maximise operational efficiency and reduce operating expenditure.”