TORONTO -- Barrick Gold Corp. (TSX:ABX) shook up its executive suite on Wednesday and announced the departure of president and CEO Jamie Sokalsky.

The gold miner said Sokalsky will be replaced by senior executive vice-president Kelvin Dushnisky and executive vice-president Jim Gowans who will serve as co-presidents of the company.

The move comes just months after John Thornton took over as chairman of the gold miner from founder Peter Munk.

"These structural changes put an even greater emphasis on operational excellence, and will accelerate our portfolio optimization and cost reduction initiatives, while fostering a partnership culture both inside the company and externally," Thornton said in a statement.

Thornton, a former president of Goldman Sachs, joined the gold miner as a director in 2012 and was highly touted by Munk as the type of executive needed to take Barrick to the next level.

Sokalsky has guided Barrick through a difficult period since replacing Aaron Regent two years ago and working to cut costs and improve the company's balance sheet.

However, under his watch, Barrick shares have been cut in half and the company has taken billions in impairment charges as the price of gold has fallen.

Barrick stopped work at its Pascua-Lama project in South America last year after massive cost overruns and a court ruling that put construction on hold until it completes work to protect the water systems as part of its environmental commitments.

The company has also sold what it deemed non-core operations in recent months and worked to reduce its debt with near $3-billion stock offering late last year that was used to repay debt.

Sokalsky said Wednesday it was time for the next phase of the company's development.

"I believe our new management structure will allow Barrick to address successfully the key challenges facing the mining industry today, and in turn, will position the company to deliver superior returns to its shareholders in the future," he said in a statement.

The changes will take effect on Sept. 15 with Sokalsky helping with the transition process.

Other planned changes include appointing chief financial officer Ammar Al-Joundi to the additional role of senior executive vice-president to work on the company's strategic initiatives.

Senior vice-president of human resources Darian Rich will take on the newly-created role of executive vice-president of talent management, intended to retain and develop future employees.

In April, longtime merger talks between Barrick and Newmont Mining Corp. collapsed and turned into a blame game over which side failed to make it happen.