He was a member of the South Australian House of Assembly from 1884 to 1905, representing the electorates of Gumeracha (1884-1902) and Murray (1902-1905).

[3] The last two years of his articles were served in the office of Sir John Downer, and he was admitted to the bar in April 1874.

He was appointed Attorney-General in Thomas Playford's second Ministry in August 1890, and held office till June 1892, when he retired with his colleagues.

[3] Homburg was again Attorney-General from 15 October 1892 to 16 June 1893 and from 4 July 1904 to 24 February 1905 (also being Minister of Education in the latter term).

[2] He died in Medindie, Adelaide on 23 March 1912; he was survived by a total of four sons and four daughters from his two marriages.