Dr Jooste is the Senior Director of the Office for International Education at Nelson Mandela University. He has been in this position since July 2000. He was responsible for the development of the office as a self-funding entity. During this time international student numbers grew from 130 in 2000 to 1500 in 2018. The comprehensive internationalisation has been implemented during this period as a strategic imperative of the university. Dr Jooste is involved in the re-thinking of higher education internationalisation globally and as such has helped arrange the Global Dialogue on the Future of Higher Education Internationalisation, held in January 2014 in Port Elizabeth, South Africa.
He is the former President of the International Education Association of South Africa (IEASA). From June 1998 to June 2000, he was the Executive Director of the Eastern Cape Higher Education Association. He was the Deputy Registrar Academic from January 1993 and acting Registrar of the University of Fort Hare from January 1995 to December 1996. Dr Jooste was also a lecturer and senior lecturer in the Department of History and Economic History at the University of Fort Hare from February 1982 to February 1992. His areas of specialization are the Eastern Cape history and international relations of South Africa during the Cold War. He has published widely on South African history as well as on higher education management and presented numerous papers at local and international conferences on both topics.