In 1921, he became a member of the Society of the Belarusian School, an organization promoting Belarusian-language education in West Belarus which was then part of the Second Polish Republic and where ethnic Belarusians and other speakers of minority languages faced coercive polonization by the Polish state.

For some time, he preached Belarusian language sermons at the Church of St. Nicholas in Vilnius (then Wilno).

After several months of interrogations and tortures, Hermanovich and other teachers of the Marian lyceum of Harbin were sentenced to 25 years of incarceration and labour in the Gulag concentration camps.

[5] From there he was able to move to the Vatican and then to London where he joined the community of Belarusian Catholic priests (Ceslaus Sipovic, Leo Haroshka, Alexander Nadson and others) who had settled there after the Second World War.

Since 1960, Father Hermanovich resided at the Marian House in North Finchley, London, until his death on 26 December 1978.