Claim: The longest term a judge has served in the Commonwealth Industrial Court(1956-2004) was 33 years, 229 days by Edward Dunphy.
Evidence: 1956 1977 (de facto)
2004 (de jure) Judge Edward Dunphy 33 years, 229 days 
The court was formally established on 15 August 1956 and then Attorney-General John Spicer was appointed the first, and as it transpired, only, Chief Judge. The last judge Ray Northrop retired in 1998 however the court was not formally abolished until 2004. Judge Edward Dunphy 33 years, 229 days