Bord Gáis has appointed the head of NTR subsidiary Bioverda as its new CEO.
John Mullins, 39, will take up his position in early December 2007.
Prior to being CEO of the bioenergy company, Mr Mullins was a director at Greenstar, NTR's waste management company.
He also previously worked at ESB International Investments and as an energy consultant with PricewaterhouseCoopers.