Derrick worked as a mechanical engineer before entering the fledgling computer industry in the 1960's. He worked in software development, becoming a senior manager in a large electronics company be...view moreDerrick worked as a mechanical engineer before entering the fledgling computer industry in the 1960's. He worked in software development, becoming a senior manager in a large electronics company before becoming a trainer in a small partnership. He started up his own business in Melbourne, Australia where he now lives. He is an adventurer and bushwalker..........................................................................................................view less