Dave Mattson is a best-selling author, sales and management thought leader, keynote speaker and leader for sales training seminars around the world. As Executive Chairman of Sandler, Mr. Mattson oversees the corporate direction and strategy for the company’s global operations including sales, marketing, consulting, alliances and support. His key areas of focus are sales leadership, strategy and client satisfaction. Under Dave Mattson's leadership, the Sandler organization expanded domestically and internationally to over 250 offices in 27 countries around the world.