Allen Terrell was the golf coach at Coastal Carolina University in the early 2000s when he recruited a new player to his team, Dustin Johnson. The long-hitting Johnson played for CCU from 2004-07, turning pro after graduating. After operating Terrell Golf Performance since 1997, Terrell and Johnson combined entities into the new Dustin Johnson Golf School. In 2013, Terrell left coaching college to dedicate more time to coaching Johnson and operating the golf schools.

In nearly two decades of player development, Terrell—who works with golfers at all levels, from youngsters to adults, amateurs and professionals—has coached more than a dozen players on the PGA and European Tours to more than 15 victories. He also has coached more than 20 NCAA All-Americans, 50 players on the Developmental Tours, 20 Conference Players of the Year, and more than 80 All-Conference recipients. In all, he has worked with more than 300 college golfers. He has coached over 50 juniors to college scholarships and worked with thousands of amateurs.