Serhiy Melnyk was born in the village of Molomolyntsi in rural
Khmelnytskyi Raion,
Khmelnytskyi Oblast,
Ukraine. From 1981 to 1984, he pursued his studies at Khmelnytskyi cooperative technical school, and starting from 1984, he attended
Khmelnytskyi technological Institute, where he completed his degree in "Bookkeeping and Analysis of Economic Activity" in 1990. He also served in the army from 1984 to 1986 before resuming his studies at Khmelnytskyi Technological Institute. Between 1990 and 1992, Melnyk worked as an economist in the plan-finances department at Khmelnytskyi Regional Housing Communal Administration. From 1992 to 1993, he held the position of a leading bookkeeper at the Administration of Housing-Communal Household of Khmelnytsky Oblast State Administration. In 1994, Melnyk assumed the role of Vice-head of the Financial Department and the Head of Economic Analysis and Planning Department at Khmelnytskyi City Executive Committee. In 1998, he was appointed Vice-head of Khmelnytsky's Mayor Office, overseeing executive power body activities as the Head of the Financial Department. Since 2000, he has been serving as the Head of Home Finances Department. From July 2002, he has held the position of the Head of the Department on Budget at the
Ministry of Finance. Melnyk was also appointed as the Head of The Main Financial Administration of
Khmelnytskyi Oblast Administration in the same year and became the Vice-head of Khmelnytskyi Oblast State Administration in 2003.
In July 2006 he was elected Mayor of Khmelnytskyi and was
reelected in October 2010. In the
2014 Ukrainian parliamentary election, Serhiy Melnyk was successfully elected as a
People's Deputy of Ukraine of the
VIII convocation. He ran as an
independent candidate in single-mandate constituency 187, located in Khmelnytskyi. Melnyk emerged as the winner of the election in that constituency, securing 33.76% of the vote. The runner-up, Vitalii Movchan of the
Petro Poroshenko Bloc, gained 18.19% of the vote. The runner-up, Vitalii Didenko from the
Svoboda party, gained 29.44% of the votes. Melnyk finished in third place with 7.33% of the votes. ==Awards and honours==