The contract for UK Power Networks is due to start towards the end of October and will last for three years with an option for two further years making it worth an estimated £45m.
Earlier this year a UKPN client focus group raised concerns that as many as one in 10 jobs were subject to delays or overruns.
As a result of winning the framework, which came up for its planned periodic renewal this year, Skanska will TUPE over O’Rourke civils staff working in London.
The scope of works includes the planning and installation of all new electrical connection projects in and around the capital.
Earlier this year Skanska secured a similar project win for the Southern area groundworks and electrical services contract for UKPN.
This is worth £30m per annum, for a period of three years with an option for two further years. Skanska is already carrying out works across Kent, Surrey and Sussex.
Peter Jones, utilities managing director, Skanska UK, said: “Winning the project strengthens out commitment to the power sector. It also demonstrates our growing capability to deliver these projects for key client, UK Power Networks.
“Over the past decade, we have developed excellent working relationships with UK Power Networks and together with the team’s innovative approach to project delivery we have secured this award.
“We are now looking forward to starting works on site.”