Ian R. Mackenzie has been an adjudicator and mediator for 14 years. He is an independent arbitrator and mediator. He is also a part-time vice-chair of the Workplace Safety and Insurance Appeals Tribunal (WSIAT). He was a vice-chair of the Public Service Labour Relations Board until 2011. He was also a vice-chair with the Human Rights Tribunal of Ontario from 2011 to 2012 and a part-time member from 2012-2016. He was the English course director for a training program for new federal tribunal members for five years and has made many presentations on administrative justice issues.