[3] In autumn 2016, Kolesnik and Avonley Nguyen of the United States had a three-week tryout in Novi, Michigan, following which he returned to Ukraine for a few months.

[5] Nguyen/Kolesnik began their Junior Grand Prix season at the 2019 JGP United States, where they placed first in both segments with personal best scores and won the gold medal.

At 2019 JGP Poland, they again set personal best scores in both segments to take the title and qualify for the 2019–20 ISU Junior Grand Prix Final.

They concluded the season at the 2020 World Junior Championships in Tallinn, Estonia, where they entered as one of the favorites for the title.

Nguyen said afterward, "I've dreamed about this moment for so long and to know that our work finally paid off, it just feels great!"

[12] After many months of searching for a new permanent partnership in the midst of the COVID-19 pandemic, Kolesnik tried out with Cypriot-American singles skater Emilea Zingas.

[15] Zingas/Kolesnik made their international debut in December 2022 at 2022 CS Golden Spin of Zagreb, where they won the bronze medal.

Zingas/Kolesnik unexpectedly placed third in the rhythm dance, less than a point ahead of Zagreb gold medalists Carreira/Ponomarenko, who had erred on their twizzles.

[14] After the free dance, Carreira/Ponomarenko had squeaked ahead overall by 0.32, but Zingas/Kolesnik stood on the podium as pewter medalists, a noteworthy achievement in a team's first season.

"[16] For their free dance, Zingas proposed skating to Alan Menken's Beauty and the Beast film score, which Kolesnik was persuaded of after a "watch party.

[18] They were invited to make their Grand Prix debut at 2023 Skate Canada International, where they placed fifth, despite a rhythm dance twizzle error.

[18] Beginning the 2024–25 Grand Prix series at 2024 Skate Canada International, they came fourth in the rhythm dance, 1.13 points behind third-place French team Lopareva/Brissaud.

Both partners received low levels on their twizzles in the free dance, and they dropped to fifth overall, which Kolesnik called "very disappointing.