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Jack Collis
Jack Collis, a former International Marketing Manager for AMP, is a successful speaker, author and business consultant. He has developed and published specialist training programs ...lihat lebih banyakJack Collis, a former International Marketing Manager for AMP, is a successful speaker, author and business consultant. He has developed and published specialist training programs for leading organizations, and is the author of several best-selling books including Yes You Can and Work Smarter. Not Harder. He lives in Sydney.lihat lebih sedikit