Michael Lawler "destroyed public confidence" in his ability to hold high quasi-judicial office and behaved "dishonourably" by participating in the trainwreck Four Corners program last year, a Parliament-commissioned report into complaints about the former Fair Work Commission vice-president found.

Mr Lawler, the partner of disgraced union whistleblower Kathy Jackson, resigned from his $435,000-a-year job earlier this month, a day before he was due to respond to the investigation by retired judge Peter Heerey.

The report found there were grounds for Parliament to request the removal of Mr Lawler from his job.

Mr Heerey was appointed by Employment Minister Michaelia Cash last year to consider widespread complaints about Mr Lawler, including that he did not disclose his relationship with Ms Jackson while still dealing with her in a professional setting and how he justified 215 sick days in 2014 and 2015.