Oleh Shyriaiev

Oleh Viktorovych Shyriaiev
Oleh Viktorovych Shyriaiev
	Oleh Shyriaiev
Native name	Олег Вікторович Ширяєв
Born	28 September 1986; Miscevo Village, Orekhovo-Zuyevsky District, Moscow Oblast, Soviet Union
Allegiance	Ukraine
Branch	Ukrainian Ground Forces
Service years	2014—2015; 2022—present;
Rank	Major
Unit	Eastern Corps (2014–2015); 127th Heavy Mechanized Brigade (2022–2023); 225th Separate Assault Battalion (2023–2025); 225th Separate Assault Regiment (2025–present);
Conflicts	Russo-Ukrainian War Battle of Kharkiv (2022); Battle of Bakhmut (2023); Battle of Avdiivka (2023–2024); Battle of Chasiv Yar (2024); Kursk campaign (2024); ;
Awards	Order for Courage, 3rd class (2022); Order of Bohdan Khmelnytsky, 3rd class (2023); Order of Danylo Halytsky, 3rd class (2024); Hero of Ukraine (2024);
Alma mater	Kharkiv National University of Economics; National Guard Military Academy of Ukraine

Oleh Viktorovych Shyriaiev (born 1986) is a Ukrainian military officer, call sign Sirko, who has served as the Commander of the 225th Separate Assault Regiment since 2023. He was awarded the Hero of Ukraine title and Gold Star after taking part in the summer 2024 incursion into Russia's Kursk region.

In addition, he has developed an armoured combat suit to protect troops from drone attacks.