Murphy has been named as the cabling civils contractor on a £2.5bn East Anglia One windfarm scheme off the coast of Suffolk.
The £13m deal will see the contractor carry out all of the cable civils work, excavation and duct installation for the 102-turbine windfarm.
The project will see approximately 85 km of cable laid offshore and 37 km laid onshore, with onshore cabling work set to begin in early October and finish by summer next year.
The East Anglia One project will be delivered by ScottishPower Renewables and will cover an area of 300 sq km, with only 42 km offshore of Lowestoft.
It is the latest win for Murphy in the offshore wind sector, having been named as main contractor for Vattenfall’s £300m Aberdeen Offshore Windfarm last August.
The firm has also delivered work on Dong Energy’s Race Bank offshore windfarm off the Norfolk coast and cabling for Dong’s Hornsea Project One windfarm in Lincolnshire, the world’s biggest windfarm.
Murphy power sector director Vince Bowler said: “This is a great win for Murphy, and follows on from previous successful experiences of working with ScottishPower and also recently with Dong Energy on their wind farms at Walney and Hornsea.”