Jacob Zuma served as President of South Africa from 2009-2018, following Thabo Mbeki (1999-2008) and preceding Kgalema Motlanthe's brief interim term in 2008-2009. Nelson Mandela was the first post-apartheid president (1994-1999), making him incorrect for this specific question's timeframe. The question appears to focus on the post-Mandela succession of South African presidents.