 In 1930 Griffiths was appointed as the Solicitor-General of Tasmania, and in August 1933 he was made a King's Counsel.From August 1938 to March 1939 Griffiths was acting Chief Judge of the Mandated Territory of New Guinea; he then became the Second Judge of New Guinea, serving in the acting Chief Judge position again during 1940.He died, in Hobart, on 4 June 1945.