Harold Proctor Shewman (April 14, 1900
Shewman was educated at Wellington School in Winnipeg. He moved to Morris with his family in 1915. He was a partner in his father's construction business and later worked as an auctioneer and insurance agent. He was a school trustee from 1925 to 1938, and served as mayor of the Town of Morris from 1948 to 1954, coinciding with his early period in the legislature.
Shewman was first elected to the Manitoba legislature in the 1949 provincial election.