Mr. Mashimbye is a qualified financial accountant who studied at the Technikon Northern Gauteng (now Tshwane University of Technology) and the Technikon South Africa (now UNISA).

He majored in Financial Accounting and Corporate Law and also studied towards his MBA with the Management College of SA (still to be completed). He is currently completing his studies towards his Corporate Governance qualification through the Chartered Secretaries Institute of South Africa. He spent more than 17 years in accounting and financial management roles, in both the public and the private sector with Telkom, Edcon, the Department of Trade & Industry and Proudly SA, with more than 10 years of these at senior management level.

Mashimbye has served on the board of The Business Place and is currently a Director on the Board of the South African Savings Institute, where he previously also held the position of Audit and Risk Committee Chairperson.
He has previously fulfilled the role of CFO (for a 10 year period), Acting COO and Acting CEO of Proudly South African and was appointed permanent CEO in December 2016.