There he received in 1934 his Aspirantur (similar to a PhD) under the supervision of Mikhail Lavrentyev, became at the beginning of 1935 a senior researcher, and became in 1938 an associate professor.
At Moscow State University, Markushevich received in 1944 his Russian Doctor of Sciences degree (habilitation) and in 1946 became a full professor,[1] retaining that academic position until his death.
In Академии педагогических наук СССР (Academy of Pedagogical Sciences of the USSR), he was elected a full member in 1967 and served as its vice-president from 1967 to 1975.
[2] The last years of his life were overshadowed by a scandal related to the theft of medieval European manuscripts from Российский государственный архив древних актов, РГАДА / RGADA (Russian State Archives of Ancient Documents; investigations revealed that the main buyer of the stolen documents was Markushevich.
Markushevich's mathematical research deals mainly with complex analysis, conformal mapping, and approximation theory.
He was head of the editorial office of mathematics of the Soviet Издательство технико-теоретической литературы (Publishing House of Technical and Theoretical Literature) from 1934 to 1937 and again from 1943 to 1947.