Dumisani Madi is chairperson of GVK-Siya Zama, one of South Africa's largest privately owned construction companies. Madi joined GVK-Siya Zama in 1996 as a quantity surveyor and held this position for a few years before being appointed as the group managing director in 2015, after Madi and his partners purchased the group from the original founders. In 2019, Madi was appointed as chairperson of the board. He is now celebrating his 25-year anniversary with the company.