[11][12] Moldauer competed at the 2017 Winter Cup where he won gold in the all-around, rings and parallel bars, and silver on floor and vault.

He competed at his first top-level international competition in March at the 2017 American Cup in Newark, New Jersey, where he placed first ahead of Olympic gold and silver medalist Oleg Verniaiev.

[3] In April 2019, he was presented with the Nissen Emery Award, an annual prize given to the top male gymnast in the National Collegiate Athletic Association.

Moldauer competed at the 2020 Winter Cup in Las Vegas, finishing first on vault, third on parallel bars, fourth on pommel horse, and fifth all-around.

[17] Moldauer finished first on parallel bars, third all-around, third on floor, fourth on pommel horse, and fifth on still rings at the 2021 Winter Cup Challenge in Indianapolis, Indiana.

[20] Moldauer competed at the 2022 Winter Cup where he placed fourth in the all-around behind Vitaliy Guimaraes, Khoi Young, and Asher Hong.

[21] As a result he was selected to represent the USA at the DTB Pokal Team Challenge in Stuttgart alongside Guimaraes, Young, Hong, and Brody Malone.

[22] In June Moldauer was selected to represent the United States at the Pan American Championships alongside Riley Loos, Brody Malone, Colt Walker, and Shane Wiskus.

He was later selected to represent the United States at the Pan American Championships alongside Shane Wiskus, Curran Phillips, Khoi Young, and Taylor Christopulos.

[30] The following day he was named to the team to compete at the upcoming World Championships alongside Asher Hong, Khoi Young, Fred Richard, Paul Juda, and alternate Colt Walker.

During the team final he contributed scores on floor exercise, pommel horse, rings, and parallel bars toward the USA's third-place finish.

[33] This performance led him to be selected to compete at the DTB Pokal Team Challenge alongside Shane Wiskus, Riley Loos, Cameron Bock, and Curran Phillips.

[35] In April, he was selected to compete at the Pacific Rim Championships along with Cameron Bock, Riley Loos, Danila Leykin, Caden Clinton, and Kai Uemura.

[38] After uncharacteristic mistakes made throughout the competition, Moldauer finished ninth in the all-around and was selected to be a non-traveling alternate for the 2024 Summer Olympics.

[42] In January 2025 Moldauer announced that he had received a 16-month suspension from the United States Anti-Doping Agency after missing three drug tests in a 12-month span due to failing to update his whereabouts information.