John is the founder of Tenacity^®, Inc. and the creator of both The Clients for Life^® client retention process and Tenacity’s groundbreaking Mobile Learning Platform. For most of the last thirty years, he has been considered the nation’s leading authority on the retention and optimization of large and complex clients. Prior to Tenacity^®, he held management positions at Continental Can, The Carborundum Co., Kimberly Clark and Aramark Corporation. John is co-author of the firm’s four books and has written many articles and been an active speaker representing the firm.