Ms Nyasulu will replace Pieter Cox, who has announced his intention to step down as chairman and director of the company. Mr Nyasulu has a 1.275% indirect interest in Sasol Oil, a subsidiary of Sasol.
The company has also appointed Juergen Schrempp as lead independent director. His role will include chairing the board when matters pertaining to Sasol Oil are dealt with at the Sasol.
Pat Davies, CEO of Sasol, said: As management we are delighted to welcome Hixonia as chairperson. We believe she will make an excellent contribution. We are grateful to Pieter for his leadership over many decades and wish him well in his retirement.