Together with his brother Vincentas and nephews Silvanas and Adomas, he contributed to religious art by building sacred statues and altars, mainly in Panevėžys, Švėkšna and various other parts of Lithuania.

Benjaminas Jakševičius lived in Kavarskas until 1945, at the same time traveling to other places where he worked as a sculptor and church decorator.

In July 1945, he joined anti-Soviet resistance movement and was a member of "Liūtas" and "Žaibas" squads (parts of Vytis district, codename Dzedunia and Šaltekšnis.

In 1960s he was allowed to move to any Soviet republic, except Lithuanian SSR,[2] but he came back to Lithuania nevertheless and was under surveillance by KGB until his death.

Jakševičius died on August 13, 1979, in Kaunas and was buried in Kavarskas Cemetery in the family grave with the white concrete sculpture of St. Mary created by him.