[5] From October 1992 to January 1993, he was the head of the advertising and marketing department of the small enterprise "KVF Iveko" in Berdyansk.

[9] In 2002, he defended his candidate's thesis on the topic "Evaluation of economically justified limits for improving the quality of industrial products.

[15] From November to December 2006, he was an intern for the position of deputy head of the Zaporizhzhia regional state administration.

[16] On 27 December 2006, Kaltsev became the deputy head of the Zaporizhia Oblast State Administration for Finance, Economy, and Foreign Economic Activities.

[22][23][24] Kalstev was a candidate for People's Deputies from the Opposition Platform — For Life party in the 2019 parliamentary elections, No.

At the time of the elections, he was an analyst at Company "Aleksandr" LLC, was a member of the "Opposition Platform — For Life" party, and lives in Zaporizhzhia.