David F. D'Alessandro, former chairman and CEO of John Hancock Financial Services, serves as an advisor and guest speaker on business issues and branding strategies, as well as topics related to professional and career development. He is sought after as a speaker for corporations and universities, including industry and governmental conventions. In addition, he is a guest columnist for the Boston Globe, and a guest commentator on CNBC on business and social issues. He is the bestselling author of Brand Warfare and Career Warfare.