Løseth is currently chief executive of Dutch energy utility Nuon, which Vattenfall acquired earlier this year. Josefsson will stay on until mid-2010 working in parallel with Løseth, Vattenfall says.

“This will be a good transfer process, one which takes into account the complexity of Vattenfall’s operations and the assets Vattenfall owns and manages,” says chairman Lars Westerberg.

The Norwegian Løsethhas worked for Nuon since 2003, and prior to that worked Norway’s state-owned electrical utility Statkraft.