Mark Sheehan has made himself wealthy both in business and on the home front by following his instincts. He's helped to pioneer and champion corporate brands, entire countries and charities, making marriages in the business community which survive long after he's left the building.He's helped to launch an international airline with Richard Branson, taken a company through the prickly obstacle course of an IPO and succeeded repeatedly at other campaigns that 'insiders' insisted could never be