Moult will be leaving his position at the end of April but will continue on the Centennial board as a non-executive director.
Cairney has been with Centennial since 2002, during which time he managed four of its mines and also headed up Health, Safety, Environment and Community across the group.
Peter Parry is returning to Centennial in May, after a two-year secondment in Bangkok as Banpu’s chief financial officer.
“After almost 20 years with Centennial, I leave the company in good shape and in a position to capitalise on the upturn in the market,” Moult said.
“I wish Mick every success in his new role and I look forward to maintaining an ongoing relationship with Centennial as a non-executive director.”
In further changes to the Centennial board chairman and company founder Bob Cameron will retire along with Banpu representative Rawi Corsiri.
Bruce Allan, who was appointed to the Centennial board in December 2007 as an independent non-executive director, will take over the reins as chairman on April 1.