His father was a pilot who studied in Kyiv at the National Aviation University and died during the genocide against the Tutsi in Rwanda when Beleniuk was 3 years old.

In 2016, he won gold at the 2016 European Wrestling Championships, followed by the silver medal at the 2016 Summer Olympics in Rio de Janeiro.

[7] In 2021, he won the gold medal in the men's Greco-Roman 87 kg event at the 2020 Summer Olympics in Tokyo.

He left the National Olympic Committee in January 2023 due to disagreement with its new president Vadym Gutzeit.

[9] In 2024, Beleniuk won a bronze medal in the men's Greco-Roman 87 kg at the 2024 Summer Olympics in Paris and subsequently retired from competing.