Klein has been a member of USA Swimming since its inception in 1980. Prior to that, he was also a coach with Amateur Athletic Union (AAU) Swimming since 1975. He has previously held the roles of Vice President for USA Swimming and President of the American Swim Coaches Association (ASCA). Klein was also a founder and President of the YMCA Swim Coaches Association. His most recent service to the organization has been as General Chair of Florida Swimming from 2016 through 2020.
In 2010 Klein and his wife Cindy started the Sarasota Tsunami Swim Team. The team, which began with only three swimmers, now has 270 and has been ranked as a Silver medal club for the last five years.
Originally from New York, Klein attended Queens College and graduated from the University of Massachusetts, Amherst with degrees and graduate studies in Exercise Science.