He was born on 29 December 1912 in Boyarkino, Ozerski District, Moscow Region. Alexander Bereznyak was a Soviet aircraft designer, a doctor of technical science (1968), and an honoured worker of science and technology in the RSFSR (1973). He became a member of the CPSU in 1932. He was employed in aviation industries since 1931. Bereznyak was a Graduate of the Moscow Aviation Institute named after Ordzhonikidze (1938). He was an engineer in the experimental design bureau of V.F.Bolkhovitinov While working in the bureau, he designed the first soviet jet, the BI-1, which was equipped with liquid fuel to power a rocket engine. The BI-1 was created in 1942 in co-operation with A.M.Isayev). He became Vice-chief designer of OKB-2 in 1946, later to become The chief designer in 1957.
In March 1957 he was assigned to lead the newly established MKB Raduga in the village of Ivan'kovo near the town of Dubna This had started in 1951 as Branch 2 of Artem Mikoyan's OKB-155 to produce the KS-1 Kometa AShM. Raduga specialised in a range of tactical missiles
Bereznyak was later awarded with the Lenin Prize,the USSR State Prize, the Order of Lenin,the Order of October Revolution, the Order of the Red Banner of Labour, and numerous medals. He died on 7 July 1974 in Dubna, Moscow region.
- BI — an early rocket-powered aircraft and the world's first rocket fighter developed by Bereznyak and Isaev in 1940-1944. It flew after German's experimental He-176, but still was the first Soviet rocket plane. Eight test planes (usually referred as BI-1 — BI-8) were built.
- 346 — experimental, trans-sonic speed, 1946.
- 468 — jet, project, 1948..1949.