From 1991 to 1993, he was a technician in the department of automated control systems of the Ukrainian State Institute for Designing Metallurgical Plants.

In 1994, he graduated from the State Metallurgical Academy, specializing in automation of technological processes and production.

As time goes by, he worked as an engineer for automation of information systems at the profile enterprises of Dnipropetrovsk.

From that year until 1999, he became the head of the repair department of the Limited Liability Company "TNP Svyaz".

In that position, Reznichenko headed subdivisions of various levels and areas of activity: press, radio and television.

On 20 February 2015, with the decree of the Ukrainian president Petro Poroshenko, Valetyn Reznichenko was appointed Governor of Zaporizhzhia Oblast.