A previous CEO of Nkonki, she has also had extensive exposure to a property owning and managing company during her four years on the board at Rebosis, where she also chaired the audit committee.
She is also the author of The ACE Model-Winning Formula for Audit Committees, used by the Institute of Directors to train audit committee members in South Africa. Her second book is titled Creating Board and Committee Effectiveness.
Zilwa currently sits on the board of directors of a number of listed companies and is a member of the audit committee and chair of the social and ethics committee of both Discovery Limited and Aspen Limited. She is also the chair of the audit committees of Metrofile Limited and Tourvest Limited and is a member of the audit committees of Mercedes Benz (South Africa) Limited and AngloGold Ashanti Limited.
