Panetta/Mimar ended their partnership sometime between late January 2020 and 18 February 2020, when Mimar began skating with McIntosh.[4] McIntosh/Mimar competed twice domestically during the 2020–21 season.
2021–22 season: Junior World bronze
McIntosh/Mimar broke the Canadian junior pairs record to win their first junior national title as a team at the 2022 Canadian Championships in January.[5] Shortly after that, they competed at their first junior international assignment, the 2022 Bavarian Open in Oberstdorf, Germany, where they won the title and earned their ISU technical minimums to compete at the 2022 World Junior Championships in April.[6]
The World Junior Championships were originally scheduled to be held in Sofia in the traditional early March period. However, due to the pandemic, they were moved.[7] Due to Vladimir Putin's invasion of Ukraine, the ISU banned all Russian athletes from competing, which had a significant impact on a pairs field dominated by Russia in recent years.[8][9] McIntosh/Mimar placed fourth in the short program but climbed to third in the free skate to finish third overall. They took the bronze medal behind Georgian team Safina/Berulava and Australian team Golubeva/Giotopoulos Moore.[10] McIntosh later said of their mindset going into the free program, "we focused on what we had to do for the free skate. We knew we were prepared, and we just had to go and show that. Even through the uncertainty of this season, we kept training and kept motivated."[11]
2022–23 season
With the Russian ban continuing into the new season, McIntosh/Mimar made their senior international debut in a very open pairs field.[12] In their Challenger series debut at the 2022 CS Finlandia Trophy, they won the bronze medal. Mimar noted the event as a "new experience" and assessed that "our free wasn't the best we could do, after a good short, but we are still happy with third place."[13]
McIntosh and Mimar were invited to make their Grand Prix debut at the 2022 Skate Canada International.[14] They finished fourth in their first Grand Prix appearance, setting new personal bests in the free skate and total score.[15] At their second assignment, the 2022 NHK Trophy in Sapporo, they placed third in the short program despite a minor throw error and set a new personal best in that segment. McIntosh said it was a "lot of fun skating in front of the Japanese crowd."[16] They were third in the free skate as well, despite McIntosh falling on a throw triple loop and seeming to hurt her shoulder. The team won the bronze medal, their first on the Grand Prix, with Mimar saying he was "very proud of my partner that she fought until then end despite a fall." McIntosh subsequently said her arm had been checked by a doctor and was fine.[17][18]
Shortly after the end of the Grand Prix, McIntosh/Mimar were the silver medallists at the 2022–23 Skate Canada Challenge after a rough free skate dropped them behind the new team Pereira/Michaud.[19] They went on to win the silver medal at the 2023 Canadian Championships. Mimar said that it was the first time he had felt "really confident on the ice" with their free skate.[20] Despite their silver medal, they were not one of the three teams selected to compete at the 2023 Four Continents Championships, though they were named to make their World Championship debut.[21] McIntosh/Mimar finished eleventh in Saitama.[22]
2023–24 season
The team was hampered by injury in the leadup to the season, being able to train heavily only in the final three weeks before their first competition: the 2023 Finlandia Trophy. They finished sixth at the event, having encountered difficulties in the free skate. Reflecting on their lack of preparation, Mimar said that "in general, we just have to keep working."[23] On the Grand Prix, they finished sixth at the 2023 Skate Canada International.[23] McIntosh and Mimar placed fifth in the short program at the 2023 Grand Prix of Espoo, but a difficult free skate dropped them to seventh place.[24]
On February 22, Mimar announced that his partnership with McIntosh had ended and that he had teamed up with Fiona Bombardier.[25]