Mezue nkebi ahịrịokwu a: Dị ka achịbishọp, a na-enyekarị Hanna ọrụ idozi esemokwu ndị metụtara ọrụ. N'afọ 1921, a họpụtara ya onye isi oche nke San Francisco's Wage Arbitration Boards; Hanna jere ozi na bọọdụ site na 1924. Gọvanọ James Rolph họpụtara Hanna ka ọ bụrụ onye isi oche nke ụlọ ọrụ gọọmentị etiti iji dozie mkpesa owu 1933 na Corcoran, California. N'oge
N'afọ 1934, mgbe ndị ọrụ ụgbọ mmiri na-arụsi ọrụ ike n'akụkụ mmiri dị n'Ebe Ọdịda Anyanwụ, Onyeisi ala Franklin Roosevelt họpụtara Achịbishọp Hanna ịbụ onyeisi oche nke National Longshoremen's Board. E kenyere kọmitii ahụ ọrụ idozi ngagharị iwe ahụ site n'ịgba n'etiti International Longshoremen's Association, International Seamen's Union, na ndị were ha n'ọrụ.