Moldauer won his second consecutive American Cup all-around title in March at the 2018 American Cup ahead of more accomplished gymnasts including Kenzō Shirai of Japan, the 2017 World all-around bronze medalist, thanks to Moldauer achieving a top three score on every apparatus. In August at the 2018 U.S. National Championships, he won the silver medal in the all-around behind Sam Mikulak.