Sean Sell is originally from Mountain View, California. He moved to Dallas where he swam with the Dallas Aquatic Club and went to Junior Nationals at age 15. His attended the University of Texas at Dallas for undergraduate studies and SMU for his Masters degree. He was a semiconductor engineer and corporate officer before a career change led him to become a swim coach. He currently coaches for the Dallas Mustangs, First Baptist Academy, DASA Summer league and starting coaching for DAM in 2011.
 Dallas Aquatic Masters
DAM or the Dallas Aquatic Masters is one of the largest masters swimming teams in the world. Co-founded and co-owned by Bobby Patten and Olympic champion Jim Montgomery, it is a year-round adult swimming team geared towards swimming in the pool and open bodies of water for fitness, fun and competition. DAM offers expertly designed adult group swim programs and adult private lessons to suit the needs of adults of all ages, abilities, and backgrounds.