David Mattson is CEO and a partner at Sandler Systems, Inc., an international training and consulting organization headquartered in the United States. In 1986, Mattson met the founder of Sandler Training, David H. Sandler, and fell in love with his philosophy, methods and materials. In 1988, he went to work for Mr. Sandler, and was eventually chosen to lead the company. Mattson continues to be a trainer and business consultant for management, sales, interpersonal communication, corporate team building and strategic planning worldwide.David is also the author of The Sandler Rules: 49 Timeless Selling Principles and How to Apply Them, and co-author of Five Minutes with VITO: Making the Most of Your Selling Time with the Very Important Top Officer. www.sandlersuccessprinciples.com