While a student, he was a member of Phi Beta Kappa and the Raven Society and was active in radical politics with, among others, David Carliner.
On April 21, 1953, he was questioned by the United States Senate Subcommittee on Internal Security as part of an ongoing effort to find Communists in the US government.
His testimony avoided answering questions directly, and digressed into fine points of constitutional law and philosophy.
Beginning in 1954 he worked for Morris Cohan and Co, then Troster-Singer, then Spear, Leeds & Kellogg, then Tucker Anthony and Day, which was ultimately purchased by John Hancock Insurance.
Weber was a member of Business Executives Against the Vietnam War, and supported Senator Eugene McCarthy's bid for the presidency in 1968.