Olzhas Ashirmatov was born on November 3, 1987 in Almaty, Kazakhstan. In 2007, he finished the Akhmet Zhubanov Kazakh Republic specialized music school for talented children where he had studied under Yuri Lukichev and Nurtas Aigalkaev. In 2011, he graduated from Hochschule für Musik, Theater und Medien Hannover (class of professor Dag Jensen). In 2011–2016, he studied at Hochschule für Musik und Theater München (class of professor Dag Jensen).

Olzhas Ashirmatov is the first prize laureate of the Republican young wind and percussion performers’ competition (2004, Almaty), the second prize laureate of the Shabyt International wind and percussion competition (2005, Astana), the second prize laureate of the International wind instruments competition (2005, Novosibirsk), and the first prize laureate of the Batyrkhan Shukenov First Republican woodwind competition (2018, Almaty).

In 2012, he interned at the academy orchestra of the Schleswig Holstein music festival. Since October 2017, he has been a regulator soloist at the State Academic Symphony Orchestra at the Zhambyl Kazakh State Philharmonic. Since November 2019, Olzhas Ashirmatov has been a regulator soloist at the musicAeterna orchestra.