After graduating from its high school, he studied pre-med at the University of Idaho in Moscow.

[3][4][5] Robson joined the United States Navy in 1941 and was assigned to the Naval Air Training Command.

After graduating from law school, he served as district attorney for the Trust Territory of the Pacific Islands.

He also held positions in the Idaho Republican Party, including state finance chair and member of the executive committee.

[5][6][7] In 1970, Robson argued on behalf of Idaho in Oregon v. Mitchell;[8] later that year in the November election, he was defeated by Democrat Tony Park.