1. Serhiy Ostapenko was born into a family of poor peasants and his father had another job as a freight transporter.

1. Serhiy Ostapenko was born into a family of poor peasants and his father had another job as a freight transporter.
From 1893 to 1897, Serhiy Ostapenko attended the local elementary school, after which, he enrolled into an agrarian middle school in Bilokrynytsia of Kremenets uyezd.
In 1905, Serhiy Ostapenko was arrested for being a member of the Ukrainian Socialist-Revolutionary Party.
Serhiy Ostapenko spent the next three years in jail for "political reasons", as he claimed.
Serhiy Ostapenko graduated from the Vladimir Cadet Corps after final tests in 1909 and the same year enrolled into the Economic school of Kyiv Commercial Institute.
In 1914 Serhiy Ostapenko was transferred to Kharkiv where he headed the Bureau of Statistics for the Mining Industry of Sloboda Ukraine.
In February 1919 when the government of Ukraine had to relocate out of Kyiv to Vinnytsia with the advancing Bolshevik forces, Serhiy Ostapenko discontinued his membership with the Ukrainian SRs.
The Directorate of Ukraine requested Serhiy Ostapenko who was appointed to find the understanding with the members of the Entente to form another government.
Serhiy Ostapenko's government was composed mostly out of more liberal-democratic representatives, but as the government did not bring any real results in the short period of time in couple of months it was replaced by the government of more socially oriented Borys Martos.
Serhiy Ostapenko found no place in the new government was found and he moved for couple of months to Galicia.
Still unable to find a job, Serhiy Ostapenko applied to the Kamyanets-Podilsky State University that was hiring numerous professors and private-docents in various fields.
Serhiy Ostapenko became a private-docent at the Department of Statistics of the University's Jurisprudential School and started his work in October 1919.
On 25 February 1920 Serhiy Ostapenko was confirmed as the permanent docent of the Department of Political Economy and Statistics.
In May 1921 the Supreme Extraordinary Tribunal began the hearing of the affair of Ukrainian SRs on which Serhiy Ostapenko was invited as a witness.
Serhiy Ostapenko plead not guilty and was given five years of correctional labor camps.