Upon graduation and until 1932, in conjunction with the Winnipeg City Engineer, he was involved with structural design of bridges, viaducts and subways.

Several years later Hershfield continued his education and received the degree of Master of Applied Science from the University of Toronto in 1950.

His master's thesis was titled "Series Expansion of Joint Rotations for the Analysis of Rigidly Framed Structures ".

From 1941 to 1943 he was a staff member of the Canadian Department of National Defense, Naval Service, Works and Building Branch as Senior Assistant Engineer, with the rank of Lieutenant.

The firm today exists under the name Morrison Hershfield, with offices across North America specializing in multidisciplinary engineering and related expertise.