Serhii Us was born on June 11, 1989, in the village of Ukrainka, Ostroh Raion, Rivne Oblast. He studied at Ukrainka Secondary School, which he graduated from in 2005. After finishing school he applied for a course in Mechanics at Kvasyliv Vocational School.
Serhii served in the Armed Forces of Ukraine in the town of Dievichki, Kyiv Oblast, later within three years he continued his service by contract in the town of Novohrad-Volynskyi.
On November 16, 2014, Serhii went through retraining at Yavoriv Combat Training Center.
The junior sergeant of the 80-th Lviv Airmobile Brigade since November 11, 2015, was mobilized to the ranks of the Armed Forces of Ukrainian, he took part in the battle actions near the village of Konstiantynivka and the village of Drushkivka, carried out the cover of certain areas of the State border. At the end of September 2016, he was demobilized. Later Serhii began his contract service in the Anti-aircraft Missile Regiment in the town of Shepetivka. There he was detached to the 128th Mountain Brigade.
Serhii died on 01.09.2017. Serhii was buried during Christmas holidays in his native village.