[3] She was accepted to study Urban Planning at the University of Waterloo beginning in the fall of 2021 and stated her long-term aim was to become a physician.

[1] As a child, she attended the 2010 Winter Olympics skating competitions in Vancouver, and in later years would cite witnessing bronze medallist Joannie Rochette's famous short program as "an inspiring moment, and it's one I will never forget.

[7][8] Making her junior international debut, Schizas placed fifth at the Volvo Open Cup in November 2019 in Riga, Latvia.

[9] At the Championships in January, she placed second in the short program despite performing only a double toe loop as the second part of her planned jump combination.

[10] She was third in the free skate after making several jump errors, including four singled attempts at a double Axel, and as a result, won the bronze medal, finishing 7.47 points behind the champion, Emily Bausback, and 0.87 behind silver medallist Alison Schumacher.

Ranked sixth in the short and third in the free, she finished third overall behind Japan's Rika Kihira and Yuhana Yokoi and was awarded the bronze medal.

[15] She was assigned to make her Grand Prix debut at the 2020 Skate Canada International, but the event was cancelled as a result of the coronavirus pandemic.

[16] Schizas planned to introduce the triple Lutz jump into her programs for the new season, having worked on it for a few years previously without sufficient results.

Skating journalist Beverley Smith remarked, "we can't technically call Madeline Schizas a Canadian champion", "but effectively, she is.

[23] She was next assigned to make her Challenger debut at the 2021 CS Finlandia Trophy, where she placed ninth, including setting a new personal best in the free skate.

Despite some jump errors, she easily won the free skate as well, taking the gold medal and becoming the presumptive nominee for the Canadian Olympic team.

[29] Schizas said she was "a little bit nervous before today about being a part of the team and skating individually, but they gave me so much support, and I just loved the experience.

When asked about the possibility of the Canadian team being moved up to third, Schizas noted, "we have not won a medal yet; we're waiting on the outcome of the investigation.

"[35] Days after the Olympics concluded, the International Skating Union banned all Russian and Belarusian skaters from competing at the 2022 World Championships due to the invasion of Ukraine.

Schizas entered the competition with the stated goal of placing in the top ten to recover a second berth for Canadian women.

[39] Beginning the season at the 2022 CS Nebelhorn Trophy, Schizas placed second in the short program but dropped to fifth overall after a tenth-place free skate.

She shared the Fritz Geiger Memorial Trophy with the rest of the Canadian delegation, awarded to the top country at the competition.

[41] Schizas' first Grand Prix assignment, the 2022 Skate Canada International, was held in Mississauga, the same location as her breakthrough bronze medal win at the Canadian Championships three seasons earlier.

For the free skate, she decided to use George Gershwin's "Summertime", working with the ice dance coaches Carol Lane and Juris Razgulajevs.

She had the same short program score as South Korean Kim Chae-yeon, but lost the tiebreaker for the overall segment lead, thus rating second.

"[56] Moving on to the Grand Prix at the 2023 Skate Canada International, Schizas had a poor short program, making errors on all her jumping passes and finishing eighth in the segment.

[58] Considered the heavy favourite and going into the 2024 Canadian Championships seeking a third consecutive victory, Schizas won the short program despite performing only a triple-double combination.

[59][60] She called herself "hugely disappointed" in her performance, in light of what she had considered successful training the leadup, saying that it now seemed "a waste of everyone's time, including mine.

"[59] In the short program at the 2024 Four Continents Championships in Shanghai, Schizas received a quarter underrotation call on the second part of her jump combination and stepped out of her triple loop, and was ranked ninth in the segment.

She improved in the free skate, her only errors being another quarter underrotation on a triple loop and a stepout on a double Axel, and rose to sixth overall.

Despite this being a lower ordinal than the previous year, she cited it as an improvement due to being only 1.33 points behind bronze medalist Hana Yoshida, as well as having been consistent across both programs.

[70] After debuting the program at a Skate Ontario training day,[70] Schizas entered the 2025 Canadian Championships in Laval seeking to reclaim her national title.