Biography

Serhii Vasylovych Kosiak was born on February 21, 1969, in the city of Brovary, Kyiv region. He studied engineering but chose to dedicate himself to family and entrepreneurship when his daughter was born. Over the years, he built a successful business, creating a network of shops. Beyond work, Serhii was passionate about music, theater, and sports. He played the guitar, enjoyed symphonic performances, and lived with an unquenchable zest for life. He loved the outdoors, hiking in the Carpathians and Crimea, kayaking rivers, and even climbing Mount Elbrus. At 50, he ran marathons and ultramarathons, embodying resilience and determination.

In early 2022, Serhii closed his last shop and, when Russia launched its full-scale invasion, he joined the Armed Forces of Ukraine. Initially serving in an anti-aircraft battery, he later transferred to the infantry, unwilling to remain in the rear. He became part of the 5th Separate Assault Brigade, fighting on the Bakhmut front. His comrades valued his courage and his unwavering commitment to duty.

Despite sustaining serious injuries, Serhii returned to service after rehabilitation, determined to continue defending his homeland. On August 20, 2023, during a mission in the village of Klishchiivka in Donetsk region, he was killed while attempting to evacuate a wounded comrade under artillery fire.

Junior Sergeant Serhii Kosiak was laid to rest in his native Brovary.

He is remembered as a devoted father, a loyal friend, and a true patriot who gave his life for Ukraine’s freedom. His legacy endures in the love of his children, the respect of his comrades, and the gratitude of his nation.