In 2024, she earned her first senior international individual gold medal, winning the 100 meter backstroke at the 2024 World Aquatics Championships.

[1][4] In August 2023, she announced she was transferring to the University of Virginia, whose swim and dive team had won 3 consecutive NCAA championships.

[5][6] When she was 15 years of age, Curzan competed at the 2019 World Junior Championships in Budapest, Hungary, winning a total of four medals, of which three were in individual events.

[16] The following month, at the 2021 TAC Spring Invitational, she set a new world junior record in the long course 50 meter freestyle with a time of 24.17 seconds.

[32][33] She qualified for the semifinals of the 50 meter butterfly in the morning prelims session on day three, ranking fourth with her time of 25.17 seconds.

[42][43][44] Finishing her day five events, she qualified for the final of the 50 meter freestyle ranked sixth with a time of 23.80 seconds in the semifinals.

[48][49][50] In her third final of the session, she placed sixth in the 50 meter freestyle behind fifth-place finisher and teammate Abbey Weitzeil with a 23.91.

[60] Two days later, Curzan swam a 53.81 in the final of the 100 meter freestyle, finishing 1.14 seconds behind gold medalist Mollie O'Callaghan of Australia to place eighth.

[66] Later in the session, she tied for fifth-place with Mélanie Henique of France in the final of the 50 meter butterfly, finishing in a time of 24.92 seconds.

[66][68] Approximately 20 minutes later, she ranked twelfth in the semifinals of the 50 meter freestyle with a 24.22, 0.85 seconds behind first-ranked Katarzyna Wasick of Poland, and did not advance to the final.

[70] She finished her evening competition for the day in the semifinals of the 100 meter butterfly, ranking fifth with a 56.37 before withdrawing from competing in the final.

[71] For her first of two finals on day six of six, Curzan won the silver medal in the 200 meter backstroke with a personal best time of 2:00.53, finishing 1.27 seconds behind gold medalist and world record holder in the event Kaylee McKeown of Australia.

[73][75][76] After a disqualification in the final of the 100 yard butterfly on day three, she rebounded to win the first individual event conference title of her collegiate career in the 100 yard backstroke, where she set a new Championships record with a time of 49.46, which lowered the mark 0.04 seconds from the previous record set by Regan Smith one year earlier.

[78] In her third event of the evening, she finished the backstroke leg of the 4×100 yard medley relay in 49.76 seconds to help win the conference title with a final mark of 3:25.79.

[80][81][82] In her second of two events she won the conference title as well, this time anchoring with a 47.15 for the 4×100 yard freestyle relay to help finish first in 3:08.83.

[80][81] In the 4×50 yard medley relay on day one of the 2023 NCAA Division I Championships in Knoxville, Tennessee, Curzan helped place ninth in a final time of 1:35.44.

[86] On the fourth and final day, she won her first NCAA title in an individual event, finishing first in a time of 1:47.64 in the 200 yard backstroke.