[2] Wiskus competed at his first elite level National Championships in 2014 and finished 11th in the all-around and fourth on the floor exercise.

[11] In 2018 Wiskus began competing with the Minnesota Golden Gophers and was named the 2018 Big Ten Conference Freshman of the Year.

In February he competed at the 2018 Winter Cup where he placed ninth in the all-around and won silver on floor exercise behind Sam Mikulak.

[12] At the 2018 NCAA National Championships Wiskus helped Minnesota finish second as a team and individually he won silver in the all-around behind Yul Moldauer.

[16] He competed at the World Team selection trials where he placed third in the all-around behind Sam Mikulak and Akash Modi.

[19] He next competed at the American Cup where he placed fourth behind compatriot Sam Mikulak, Ukrainian Oleg Verniaiev, and James Hall of Great Britain.

Wiskus returned to competition at the 2021 Winter Cup where he placed fourth in the all-around but won gold on floor exercise.

[2] At the 2021 U.S. National Championships Wiskus placed ninth in the all-around after falling off the horizontal bar three times on night two of the competition.

[27] At the Olympic Games qualification, Wiskus finished 21st in the all-around; however, he did not advance to the finals due to two-per-country limitations as Malone and Mikulak placed higher.

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

[30] On the first day of competition Wiskus competed on all six events to help qualify the United States in first place to the team final.

[33] Wiskus was selected to represent the United States at the Pan American Championships alongside Yul Moldauer, Curran Phillips, Khoi Young, and Taylor Christopulos.

[36] The following day he was named to the team to compete at the Pan American Games taking place in late October alongside Donnell Whittenburg, Colt Walker, Stephen Nedoroscik, and Cameron Bock.