On 11 January 2002, he was appointed Auxiliary Bishop of Lviv, Ukraine and Titular Bishop of Nisa in Lycia. On 17 February 2002, he was consecrated by Cardinal Liubomyr Huzar. When the Major Archeparchy of the Ukrainian Greek Catholic Church returned from the city of Lviv to the Ukrainian capital of Kyiv in 2004, Major archbishop Husar translated to the new see. On 10 November 2005, Ihor Vozniak was elected Archbishop of Lviv.[1]
He served as the interim administrator of the major archepiscopal see of Kyiv after the resignation of Cardinal Husar until the election of Sviatoslav Shevchuk in February 2011.