In 1902 he was employed as solicitor to act for Imperial Tobacco Company and American Tobacco Company in their formation of the joint venture British-American Tobacco Company Ltd.[1] He was appointed a director of the three companies, and was one of the deputy-chairman of British American Tobacco. He resigned from these positions in 1921.[1] In 1900 he married Katherine Kenny of County Wexford, and the couple had three daughters. She died in 1913.[1] His second marriage was to Marie Robinson of Dublin, with whom he had two sons.[1]
Sir Joseph and Lady Hood were granted the freedom of the borough of Wimbledon in 1924.[1] In 1930 he was elected mayor of Wimbledon by the borough council, an office he held until his death at his Wimbledon home after a short illness in January 1931.[1][8] He was succeeded in the baronetcy by his eldest son Harold Hood, then aged 14.[1][9]