A. A. Thorne was in public service for five decades, holding numerous elected an appointed offices at municipal and national levels continuously for 50 years from 1902 to 1952. Nationally, Thorne was elected to the
Combined Court, British Guiana's legislative body from 1906 to 1911 as the Financial Representative for the County of Essequebo - North Western division. He was re-elected to the Court for a second term from 1916 to 1921 for
New Amsterdam, again as the Financial Representative. He was elected as City Councillor for Georgetown City Council for 47 continuous years starting in 1902. He was elected as the city's Deputy Mayor in 1921, 1922 and 1925. While serving in government, Thorne argued for opening avenues of employment to Guianese, including the Civil Service. He worked to get the
Anglican church disestablished as the national religious body for the colony. This was particularly after the 1896 elections, where the church actively tried to influence the result. In the Combined Court he pushed for the establishment of a national board of education, which was duly launched in 1908, and survived until 1924. He repeatedly lobbied to extend the vote to more citizens. At the turn of the twentieth century there was a minimum income, property or land requirement in order to register as a voter for national and municipal elections. This was initially set so high that the great majority of British Guiana's residents were disenfranchised. For municipal councillors, the income minimum was higher than that of electors. Over the years both requirements were lowered, to somewhere closer to universal suffrage, by the time of his death. Thorne joined the Reform Association soon after his arrival in British Guiana, which by 1896 had merged into the larger
Progressive Association. Elections at this stage were against named candidates rather than political parties, but the Progressive Association ran a slate of successful representatives in the 1896 Combined Court elections. Thorne, who was on the party's executive committee, did not stand in these elections but was recorded as having a decisive influence on the outcome. In later elections Thorne stood for elections under his own name, effectively as an independent. On Thorne's death in 1956, the Daily Chronicle said that Thorne was the first West Indian member of the British
Labour Party. Positions held: • Georgetown City Council, 1902–1949 • British Guiana Combined Court (legislative body), 1906–1911, 1916–1921 • Georgetown Deputy Mayor, 1921, 1922, 1925 • Education Commission, 1924–1925 • Cost of Living Survey Committee, 1942 • Franchise Commission, 1942–1944 • Education Development Committee, 1943–1945 • British Guiana National Trade Council - Executive Officer, 1945 • Georgetown Fire Advisory Committee, 1945 • Georgetown Pure Water Supply Board, 1945–1946 •
British Guiana Labour Union • British Guiana Workers League, 1931–1952 ==Trade union pioneer==