He won the silver medal in the men's 65 kg event at the 2019 Asian Wrestling Championships held in Xi'an, China.

[2][3] In 2014, Okassov competed in the 65 kg event at the World Wrestling Championships in Tashkent, Uzbekistan where he lost his only match against Franklin Gómez of Puerto Rico.

In 2016, Okassov competed at the first qualification tournament hoping to qualify for the 2016 Summer Olympics in Rio de Janeiro, Brazil.

[5] In 2018, Okassov represented Kazakhstan at the Asian Games held in Indonesia and won one of the bronze medals in the men's 65 kg event.

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