[4] He then spent a few years carrying out his father's philanthropic activities and serving as an officer in various charitable and social work organizations.

The French government decorated him with the Croix de Guerre and the Legion of Honour for his military service.

Following his discharge from the army, he began working for the American embassy in London, England, where he served as special assistant to ambassadors W. Averell Harriman and Lewis W. Douglas.

He served as vice-chairman of the national board of directors and secretary of the New York committee of Project HOPE for several years.

[1] In 1926, Warburg married Jean Stettheimer of San Francisco, California, at her family's country home in Atherton, with Rabbi Jonah B.

Wise performing the ceremony and Jean's sister Barbara Ochs Adler attending the bride.

[9] In 1949, he married his third wife, Baroness D'Almeida Santos, formerly Barbara Tapper of Chicago, Illinois, at the Westminster City Registry Office at Caxton Hall in London, England, with first secretary of the American embassy Henry E. Stebbins serving as best man, John J. McCloy giving away the bride.