Muir, a geologist by trade, has also worked as an analyst for PCF Capital, Hartleys and JP Morgan.
CEO Rodney Foster will transition to non-executive technical director, while shareholder Ted van Heemst will join the board as a non-executive director.
Mustang Resources has appointed Cape Town-based Dr Bernard Olivier as MD.
Olivier is currently the CEO of Richland Resources and a director of Bezant Resources, but will transition out of those roles by the end of this quarter.
Mustang has also promoted director Cobus van Wyk to the new role of chief operating officer.
The company will look to appoint a second independent non-executive director...