Kuzma Venediktovich studied at the Medical Faculty of the Smolensk University (1922-1924), graduated from the Medical Faculty of the Voronezh State University (1928), and the Institute of Philosophy and Natural Science at the Communist Academy (1933).
Kuzma Venediktovich Kiselyov was a resident of the Clinic of Nervous Diseases of the Voronezh State University (1928-1930). Researcher at the All-Union Institute of Experimental Medicine (1933-1937). People's Commissar of Health of the Belarusian SSR (1937-1938). Chairman of the Council of Ministers of the Belarusian SSR (1938-1940). Since 1940, Deputy Director of the Institute of Experimental Medicine (Moscow), Director of the State Publishing House of Medical Literature (Moscow), Chairman of the Ulyanovsk Regional Executive Committee. 1st Deputy Chairman of the Council of Ministers (1943-1958), at the same time Minister of Foreign Affairs of the Belarussian SSR (1946-1958). In 1947, as plenipotentiary representative of the Belarussian SSR, he signed the Charter of the United Nations. Deputy of the Supreme Soviet of the USSR (1937-1958), Belarusian SSR (1938-1967).
Kiselev’s essay "My life journey" was published in Voronezh University newspaper (1970, January 6). In the essay he told about studying at the Voronezh State University. The author of "Notes of the Soviet diplomat" (Moscow, 1974).