[1][2] He competed in the 2018 Summer Youth Olympics in Buenos Aires, Argentina.

[3] Tkach debuted at the senior level in 2018 when he participated at the 2018 World Championships.

In the 2021 season, Tkach finished 10th in the men's IFSC World Cup in the competition speed discipline.

In the qualification seeding round of the 2024 Summer Olympics, Tkach received the 7th with the best time of 5.11.

He finished the competition after losing 0.01 seconds to France's Bassa Mawem in the next round and placed in the 9th position.