A native of Copperas Cove, Texas, Dewald spend the previous two seasons at McLennan Community College in Waco, Texas. He was named to the 2016 PING All-District Team by the Golf Coaches Association of America in addition to earning 2016 All-Southwest Conference First Team honors. He played in 30 tournament rounds for the Highlanders, taking medalist honors at the 2016 New Mexico Junior College Invitational with rounds of 69-71-76. Dewald has three more top-5 finishes to his resume, placing third at the 2014 Paris Junior College Invitational (70-70), fourth at the 2016 NJCAA Southwest Championship (72-75-73) and fifth at the 2015 Collegiate Amateur Championship (64-71).