Tragically, famine, oppression, war, and the challenging post-war rehabilitation of the nation marked his early years.

[2] Prior to Piatachenko's ministerial role, he had held several early positions such as the deputy chief accountant of Rybnytskyi Developments Sakhkamin of the Ministry of Food Industry of the Ukrainian SSR from 1956 to1958; the deputy chief accountant for financial issues of the Sakhkamin trust of the Vinnytsia state farm from 1958 to 1960; the deputy chief accountant of the Vinnytsia Councilor Farm from 1960 to 1965; the deputy head of the financial department of the Ministry of Food Industry from 1966 to 1972; the head of the financial department of the Ministry of Food Industry of the Ukrainian SSR from 1972 to 1984; the head of the finance department of the State Planning from 1984 to 1991.

It was made possible for Ukraine to join the IBRD and the European Bank for Reconstruction and Development (EBRD) after it became the 168th member of the Fund.

The necessity of setting up a Scientific Research Financial Institute (NDFI) within the Ukrainian Ministry of Finance was brought up by Piatachenko in 1993.

[3][2] Piatachenko personally contributed to the organization of the International Conference on the study of the world experience of implementing monetary reforms in Kyiv while serving as director of the Research Financial Institute under the Ministry of Finance, to which representatives of the relevant professional structures of the United States, Canada, Germany, and other countries were invited to participate.