Born in Cleveland, Ohio, Krupansky was in the United States Army Air Forces from 1942 to 1946.
He received a Bachelor of Arts degree from Case Western Reserve University in 1946, and a Bachelor of Laws from Case Western Reserve University School of Law in 1948.
He was a judge on the Court of Common Pleas, Cuyahoga County, Ohio from 1958 to 1959.
Krupansky served in that capacity until March 19, 1982, due to elevation to the Sixth Circuit.
[1] Krupansky was nominated by President Ronald Reagan on January 28, 1982, to a seat on the United States Court of Appeals for the Sixth Circuit vacated by Judge Paul Charles Weick.