Michael Alexander Williamson (born 26 June 1953) is an Australian former trade union official implicated in the Health Services Union of Australia (HSU) expenses scandal. In October 2013 Williamson pleaded guilty to two charges of fraud totaling nearly A$1 million, one charge of fabricating invoices and another charge of recruiting others to hinder a police investigation. The same day that he pleaded guilty, Williamson declared himself bankrupt. An earlier independent report commissioned by the union detailed that companies associated with Williamson and his family had allegedly fraudulently received more than $5 million from the union in period from 2006 to 2011. In the NSW District Court in March 2014, Williamson was sentenced to seven–and–a–half years of imprisonment; with a non–parole