Stuempfig was born in Germantown, Philadelphia. He began his studies at the University of Pennsylvania, studying architecture and then transferred to the Pennsylvania Academy of the Fine Arts (PAFA), to study painting. His instructors included Henry McCarter, Daniel Garber, and Francis Speight. From 1948–1970 he was an influential teacher at PAFA where he exhibited regularly. His paintings sold steadily and can be found in many public and private collections including the Whitney Museum of American Art; the Museum of Modern Art; the Phillips Collection in Washington, D.C.; the Philadelphia Museum of Art, and PAFA.