Ngcaba has held various prominent positions in both the public and private sectors. In the early 1990s, he played a significant role in transforming the South African telecommunications industry while serving as the Deputy Director-General of the South African Department of Communications.

He is the founder and Executive Chairman of Convergence Partners, an investment management firm focused on Africa’s technology, media, and telecommunications sectors. The company aims to support the growth of infrastructure, connectivity, and digital services across the continent.

He has also been involved in various other technology-related ventures and initiatives, including serving as the Council for Scientific and Industrial Research (CSIR) Chairman and the South African Technology Network. Ngcaba has made significant contributions to the development of technology and telecommunications in Africa, and his expertise and leadership have positioned him as a prominent figure in the industry.