Buried on August 16, 1973.

He graduated from Milton Academy in the spring of 1910 and received his A.B. degree from Harvard in 1915. Griswold sailed to Buenos Aires soon after graduation to work for the River Plate Trading Company until May 1915. He joined the American Ambulance in Paris later that year and became a member of Section Two, American Field Service, in 1916, serving for eight months. Griswold became an officer in the United States Army in 1917, training with the 15th Field Artillery at Pine Camp, New York, and in Plattsburg, New York. He served in Germany with Battery A of the First Battalion Field Artillery until he resigned from his commission in 1919.

Later that year, Griswold oversaw the building of the schooner Lloyd W. Berry, co-owned with Harold Peters (AB 1910), and traveled around the North Atlantic in it for eleven months in 1920. From 1922 to 1925, he studied as a special student at the Architectural School at M.I.T. He married Penelope B. Parkman in June 1923; together, they had four children. Griswold joined the architecture firm of Little and Russell in 1926, becoming a partner in 1929. Together with Millard Gulick (AB 1913), Griswold founded the architecture firm Griswold & Gulick.

Griswold served in World War II as a ground officer, major, and lieutenant colonel in the Air Corps, and from 1944 to 1945, they served with the Office of Strategic Services in Algeria, France, and Germany. After the war, Griswold resumed his architectural practice with a number of different partners, retiring as an active partner from Griswold, Boyden, Wylde & Ames in 1961. Griswold's first wife died in 1959, and Griswold married Christine de Marquetière Goutière – aka Christine Weston, the novelist – in June 1960. He was Weston's second husband. She died in 1989. Griswold retired in 1973 and died later that year, on June 9th, in San Rafael, California.

[From the description of Scrapbook of Roger Griswold. ca. 1910-1917 (Harvard University Archives); slightly edited]