He was an Assistant United States Attorney of the Northern District of Georgia from 1934 to 1938.

He was Chief of the Trial Section of the Criminal Division of the United States Department of Justice from 1940 to 1942.

He was a staff member for Justice Robert H. Jackson during prosecution of the Nuremberg Trials.

[1] Andrews received a recess appointment from President Harry S. Truman on October 21, 1949, to the United States District Court for the Northern District of Georgia, to a new seat created by 63 Stat.

He would otherwise have been eligible to continue serving until the sine die adjournment of the 81st United States Congress on January 2, 1951.