[2] Between 1990 and 1992, Melnyk worked as an economist in the plan-finances department at Khmelnytskyi Regional Housing Communal Administration.

[3] In 1998, he was appointed Vice-head of Khmelnytsky's Mayor Office, overseeing executive power body activities as the Head of the Financial Department.

[6] Once in parliament, Melnyk assumed the position of Vice-head of the Committee of the Verkhovna Rada on budget issues and became a member of the Petro Poroshenko Bloc "Solidarity" faction.

[citation needed] During the 2019 Ukrainian parliamentary election, Melnyk once again competed as an independent candidate for reelection in single-mandate constituency 187.

Mykola Stefanchuk, representing the Servant of the People party, emerged as the winner of the constituency, receiving 35.83% of the votes.