Mark's journey as an Olympic swimmer spans from 1965 to 1972. He won a total of 11 medals, out of which nine were gold. Having set 33 world records during his swimming career, Mark was voted the water sports' athlete of the century. In 2000, Sports Illustrated listed him among the six Greatest Olympians. His exceptionally successful swimming career made him famous, earning him a massive fanbase in the United States and abroad. Those who watched him in action will tell you that Mark has unmatched abilities that set him above his competitors.

When Mark's glittering career ended, Mark set his eyes on business and entrepreneurship. He started by setting up a real estate firm in Beverly Hills. The company did well but later slowed down when the market became flooded. Having sensed that in time, Mark decided to try his luck in the stock market, where he specializes in private equity. Here, his continued efforts to pursue lucrative investment opportunities have been extremely rewarding.

Today, Mark traverses the world for speaking engagements where he inspires and motivates all types of audiences, young and old. Some of his notable presentations include World Events, Being a Jewish Athlete, and What Makes a Champion.