Northern Mining CEO Greg Wilson has resigned and Perseus Mining managing director Mark Calderwood has also moved aside, as management shake-ups continue into 2013.
In a statement today gold and nickel explorer Northern Mining said Wilson's resignation was effective immediately, but he would continue to consult the company on technical matters.
Perseus Mining said Calderwood's position at the top of the company would be taken over by chief financial officer Jeff Quartermaine on February 1.
The company is currently focused on its Edikan gold mine in Ghana, but production guidance was missed in both the September and December quarters.
In a statement Perseus said Calderwood would continue to work in a “part-time technical role” at the company, which would focus on “his strengths in project generation, recognition and discovery”.
The changes at Perseus and Northern Mining are the latest in a recent flurry of restructuring efforts in the industry.
BHP Billiton is also searching for a new CEO to replace Marius Kloppers.