Hu Hanrahan is Professor of Communications Engineering in the School of  Electrical Engineering and Information Engineering at the University of the Witwatersrand, Johannesburg, South Africa. He received the B.Sc.(Eng) degree with distinction from the University of the Witwatersrand in 1962 and the Ph.D from the same institution in 1969.

He leads CeTAS, the Centre for Telecommunications Access and Services, a research and advanced teaching centre devoted to improving knowledge and practice in the evolving telecommunications access network and telecommunications services. CeTAS has been the home of the South African TINA Trial (SATINA) project.

He teaches graduate courses in the Masters programme:  Integrated Digital Communications, Intelligent Networks and Introduction to Next Generation Networks.