Herbert Began working as a mining engineer from 1895 to 1913
In 1899, he married Lou Henry. During World War I, This was Herbert Hoover most important moment of his life as e has married the woman of his life.
He served with distinction as chairman of the American Relief Committee in London, as chairman of the Commission for Relief in Belgium, and as U.S. Food Administrator.
His political affiliations were still too indeterminate for him to be mentioned as a possibility for either the Republican or Democratic nomination in 1920, but after the election he served Harding and Coolidge as secretary of commerce.