Mark holds the Certified Speaking Professional designation from the National Speakers Association (NSA) and is a member of the Speaker Hall of Fame. He was recently honored with the Cavett Award, the highest honor the NSA bestows on its members, in recognition of his outstanding contributions to the speaking profession. In 2019, Global Gurus named Mark the #5 Leadership Authority in the world.

Guest Blog: 15 Incredible Businessmen Who Refused to Retire

This post is compliments of  OnlineMBA.com. For many who reach the top echelons of business, retirement is a time to enjoy the spoils of a life well lived and years of hard work and perseverance. Others, however, take a different approach. For every businessman anticipating retirement, there’s also one who dreams of working until old age,…