Jon Hartley has resigned from the board of Mighty River Power, the company said today.
Hartley has been a director of Director of Mighty River Power since November 2009, and will be officially stepping down from his role on February 20.
He added that the decision to step down from the board of the state-owned electricity company was a difficult one, brought on by the revised timing of the proposed IPO.
The Government is preparing to list Mighty River on the stock exchange in the first half of this year.
"Unfortunately, I have commitments to a number of self-funded overseas engagements with World Vision International and its micro finance subsidiary, VisionFund International, of which I am Vice Chair," he said.
Mighty River Power's Chair, Joan Withers, said it was with regret that the Board had accepted Hartley's resignation.
"Jon is held in very high regard by the board and the company has benefited from his expertise, contribution and commitment for the past three years. We understand and respect his decision and wish him well," said Withers.