[1][4] After a career in the Soviet industry he became deputy mayor of Zaporizhzhia from 1994 until 1999 and until 2006 in the city's administration.

[1] From 2006 until his election as Mayor Sin held various high post in the Zaporizhzhia Regional State Administration.

[1] In October 2010 Sin was elected Mayor of Zaporizhzhia as a candidate of Batkivschyna.

[5] In December 2010 Sin left this party "so that no political context is a source of provocations and insinuations about me.

[7] The Party of Regions expelled Sin, since they said he was responsible for "policy failure and the collapse of the urban economy", on 24 February 2014.