Mack is a qualified Chartered Accountant and Chartered Management Accountant (CIMA, UK) with extensive experience and expertise in mining finance environment. He obtained his Bachelor of Commerce in Accounting degree from the University of the Witwatersrand (Wits). He further holds a postgraduate honours degree from University of Kwazulu Natal (UKZN). Furthermore, he holds postgraduate certificates in Senior Management Development from the University of South Africa (Unisa).

Mack has trained as an auditor and accountant at PricewaterCoopers (PwC, Johannesburg) specialising in metals, mining, construction and financial services sector. Amongst some of the clients Mack serviced where Goldfield Ltd, Group 5, Basil Read, Foskor, Impala Platinum, SAB, Toyota SA Motors and Namakwa Diamonds.

After completing his training and promoted to middle management, Mack was recruited to join a junior miner, Umcebo Mining Group as the Financial Controller. Soon thereafter Mack joined Optimum Coal Mine as the manager of Internal Audit and Compliance and then Financial Services Manager. Following the acquisition of Shanduka Coal and Optimum Coal by commodities trader, Glencore, Mack was then recruited to become the Group Financial Manager for Shanduka Coal Group of Companies which included both opencast and underground operations. The Group consisted of Shanduka Coal, Umcebo Mining, Hlagisa Mining, Springlake, Umsimbithi Mining and Koornfontein Mines. Mack also serves on the board of trustees for the Optimum Coal, Umcebo and Shanduka Coal environmental rehabilitation, employees share-ownership schemes and communities’ trusts.

Mack joined Mwelase Mining in January 2017 from Glencore Coal SA to fulfil the role of the Chief Financial Officer for the group.