Born in Kutztown, Pennsylvania, Grim received an Artium Baccalaureus degree from Swarthmore College in 1924 and a Bachelor of Laws from Harvard Law School in 1929.
He was Chairman of the Berks County, Pennsylvania Democratic Party Committee from 1940 to 1944.
[1] On October 21, 1949, Grim received a recess appointment from President Harry S. Truman to a new seat on the United States District Court for the Eastern District of Pennsylvania created by 63 Stat.
Formally nominated to the same seat by President Truman on January 5, 1950, Grim was confirmed by the United States Senate on April 4, 1950, and received his commission on April 7, 1950.
He assumed senior status due to a certified disability on November 1, 1961, serving in that capacity until his death on December 7, 1965, in Philadelphia, Pennsylvania.