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Sir John is a Cambridge graduate who started work in the automobile industry. His career took flight when he founded CAP Scientific Ltd, which grew rapidly to become a core part of the CAP Group plc and subsequently the Sema Group plc of which he was UK Managing Director. He was then asked by the government to take on the transformation of its defence research laboratories into a commercial organisation. In due course these became an internationally successful technology services company and were floated on the LSE as QinetiQ Group plc of which he became Chairman in 2006.