Mick joined the railway in 1978 within the Signal and Telecommunication (S&T) department and subsequently, in 2002, became the Senior Assistant General Secretary of RMT. In that position he undertook a number of roles and responsibilities, which included negotiating with employers, and dealing with the media and government. In addition, he became an Employee Director of the Railways Pension Scheme for approximately ten years between 2004 and 2014, and served on key Committees of the Trustee.
Mick has also served a number of Pension Committees and was a Member Nominated Trustee of the Network Rail CARE and DC Schemes. From 2014 to 2021, Mick was the RMT General Secretary and an Employer-Nominated Director of the RMT pension fund. In 2021, Mick became a Trustee of the Railway Benevolent Fund.
Mick was re-appointed as a Trustee Director in 2021.