St Barbara CEO Tim Lehany has resigned suddenly, and will leave the company at the end of this month.
The gold miner announced its head's intention late yesterday.
According to St Barbara, despite the swift movement of Lehany a "structured succession process to replace [him] is well advanced and an early appointment of a replacement managing director and CEO is anticipated".
The miner went on to outline the upcoming priorities for the company, which include consolidating "the operational excellence of the Leonora operations and [assessing] and [resolving] the strategic options for the future of the Pacific Operations".
No reason was given for Lehany's sudden departure from the top role, however he will stay on until August 31 to assist with the transitional period.