At the Department of Communications, Ngcaba was responsible for policy formulation that restructured the ICT sector and presided over various groundbreaking initiatives designed to reorganise and overhaul the telecommunications sector, broadcasting industry, postal services and e-commerce in accordance with the imperatives of the new South African society.
While he was Director General, Ngcaba founded of the Institute for Software and Satellite Applications (ISSA) and the National Electronic Media Institute of South Africa (NEMISA).