In September 1936 he enrolled in the courses of the Leningrad Academy of Economic Studies, which he graduated in 1938 with the qualification of economist, specialist in finance.

Later he was appointed as head of the budget section (Narkomfin) within the People's Commissariat for Finance of Moldavian ASSR.

Since September 1939 he heads the finance and trade section of the Soviet of the People's Commissars of Moldavian ASSR.

After the occupation of Bessarabia by the USSR, Alexandru Diordiță was appointed deputy commissioner of the people for finance of the Moldavian SSR.

After the occupation of Odessa by the Romanian-German armies, Diordiță is appointed deputy director of the Orenburg Economics Bank.