During World War II, she reportedly was implicated in spying activities on behalf of the Soviet Union.

[1][2] In April 1945, Sidorovici was appointed by royal decree public prosecutor at the Bucharest People's Tribunal.

In May and June 1945 she, Constantin Vicol, Ion D. Ioan and Avram Bunaciu prosecuted a dozen prominent journalists, including Pan M. Vizirescu, Pamfil Șeicaru [ro], Stelian Popescu, Nichifor Crainic, Grigore Manoilescu [ro] and Radu Gyr.

[5] Later that year she was elected to the new Great National Assembly, and appointed Secretary General of the Ministry of Mines and Petroleum, a role she held until 1958.

She used the experience as the basis of a book that she co-authored with Brucan (a virulent attack on American institutions).