Andrew has worked for 35 years as a strategy advisor and coach to the senior management of many of the world’s leading companies. His clients have included established public companies such as Citigroup, Bank of America Merrill Lynch, WPP, Xerox, Experian, Hess, Cognizant, UBS, and Lloyds Banking Group; and also many privately held professional service firms, including Towers Watson, ZS Associates, Bain & Company, PwC, Sidley Austin, Deloitte, Spencer Stuart, Egon Zehnder, Ernst & Young, Booz Allen Hamilton, Norton Rose Fulbright, The Blanchard Companies, and many others. He is the most widely published author in the world on this topic, having written eight acclaimed books on building clients for life, including the international bestsellers Power Questions and Clients for Life.