From 1957 to 1972 Derkach worked at the Soviet Rocket giant Yuzhmash in Dnipropetrovsk (today Dnipro). From March of 1972 to December of 1992 he worked for the Ukrainian SSR KGB (in 1992 became Security Service of Ukraine) in Dnipropetrovsk Oblast.
In 2005, the report of the ad hoc committee of the Ukrainian parliament investigating the murder concluded that Gongadze's murder had been organized by then President Kuchma and his Minister of the Interior and that Derkach had been involved in the crimes.
| Director of the Security Service of Ukraine
| Chair of the State Customs Service
- Schneider, Eberhard (2010). "Ukraine - gespalten zwischen Ost und West (Ukraine - divided between East and West)". Bundeszentrale für politische Bildung (German Federal Agency for Civic Education). Retrieved December 5, 2019. (Translation of relevant paragraphs at Talk on page of Andrii Derkach, L. Derkach's son)
- "Case of Gongadze v. Ukraine". HUDOC - European Court of Human Rights. February 8, 2005. Retrieved December 13, 2019.