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.