After graduating from Wits University, Mark Hennessy spent ten years as a naval office before joining IBM South Africa in 1967, where, over a period of 28 years including the time when it was ISM, he filled a variety of marketing and executive positions, culminating in that of Director of Strategy and Business Planning. After retiring from IBM he entered the travel industry and is currently a partner in a specialised tour company which operates in the USA, South America, Africa and South Asia.
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