What was Niel Barnard title during F. W. de Klerk state presidency from Aug 1989 to May 1994?
Niel Barnard: Dr Lukas Daniel 'Niël' Barnard (born 1949) is a former head of South Africa's National Intelligence Service and was notable for his behind-the-scenes role in preparing Nelson Mandela and South African presidents P.W. Botha and F. W. de Klerk for Mandela's eventual and, as he saw it, inevitable, release from prison and rise to political power. F. W. de Klerk:  He was the seventh and last head of state of South Africa under the apartheid era.
head of South Africa's National Intelligence Service