He was born in 1907 in Sebiș, Arad County (at the time in Austria-Hungary), the son of Athanasie and Vaseline Beniuc.

[1] He then enrolled as a masters student at the University of Hamburg, where he studied animal behaviour with Jakob Johann von Uexküll.

He joined the Faculty of Psychology at the University of Cluj, and moved to Sibiu after Northern Transylvania was annexed by Hungary in 1940, in the wake of the Second Vienna Award.

[1] At the end of World War II, Beniuc went to Moscow as cultural adviser, where he published in 1946 the volume Un om așteaptă răsăritul.

[3] Beniuc was the President of the Writers' Union of Romania and, from 1955, a titular member of the Romanian Academy.