As of the beginning of 2015, he is the captain, commander of the mechanized company of the mechanized battalion of the 30th separate mechanized brigade.[3][4]
On February 10–11, 2015, during the clearing of the settlement of Logvynove, thanks to the officer's courage and lightning-fast decisive actions, the assault group captured part of the settlement, while Volodymyr Hryniuk personally destroyed 3 units of armored vehicles and up to 30 militants. He was wounded during the operation, but continued to lead the combined unit. The unit subordinated to V. Hrynyuk destroyed a large number of armored vehicles and manpower of illegal armed formations.[5]
As of October 2017, he is the deputy commander of the mechanized battalion of the 30th separate mechanized brigade.
As of July 2022, he is the commander of the motorized infantry battalion of the 30th separate mechanized brigade.[6]
In 2022, he received the Order of Bohdan Khmelnytskyi, 3rd degree (2022).[7]