John Macmillan was admitted as a solicitor in 1970 and became a fee paid industrial tribunal chairman in April 1981. He served and Regional Employment Judge for the East Midlands Region from 1997-2012 and still sits as an Employment Judge. He had national responsibility for the part-time worker pension cases (the Preston cases), and heard all of the test cases, and currently has national responsibility for the O'Brien cases (pension and related claims by fee paid judges).