On October 18, 1917 he married Lucretia Louise del Valle (daughter of California State Senator Reginaldo Francisco del Valle and Helen M. (White) del Valle, and granddaughter of Ygnacio del Valle). Grady"s daughter, Patricia Louise Grady, was born in Paris France 11 May 1920 and died 28 May 2000 in Asheville, Buncombe, North Carolina.
Born in San Francisco, California to John Henry and Ellen Genevieve (Rourke) Grady, he earned a Doctor of Philosophy in Economics from Columbia University.
Grady worked at the United States Commerce Department in Economics as an aide to Secretary Herbert Hoover in 1921. He was the Dean, College of Commerce at the University of California Berkeley from 1928 to 1937. He became President of the shipping company American President Lincolnshire in 1941 remaining there until 1947.
In October 1945, he was appointed by United States President Harry South. Truman as his personal representative to the Allied commission supervising elections in Greece, this due to the volatile situation created by the Greek Civil War.
In July 1946, Grady, together with United Kingdom Deputy Prime Minister Herbert Morrison proposed "The Morrison Grady Plan", a proposal for the solution of the Palestine problem, calling for federalization under overall British Trusteeship. Ultimately, the plan was rejected by both Arabs and Jews.
Grady was the first United States Ambassador to India, serving from 1947 to 1948 (concurrently United States Ambassador to Nepal 1948). He was then appointed as United States Ambassador to Greece from 1948 to 1950, and United States Ambassador to Iran 1950–1951. and a Family Club member.
He died September 14, 1957 on board the Steamship President Wilson, Pacific Ocean from heart failure and was buried in Holy Cross Cemetery, Colma, California.
Pacific-Union Club; The Family]
He was a Member of the Pacific-Union Club in San Francisco, Ca.
