[4] As auditor general, he identified significant waste in the city's management of road maintenance, including scheduling inefficiencies and overbilling by outside contractors,[4] as well as uncovering an illegal practice of paid shift trading taking place among employees of Greater Sudbury Transit.

[6] Bigger's contract was renewed, but several citizens of the city filed a complaint with the Ontario Ombudsman about the closed-door meetings.

[6] Bigger stated that by summer 2014, he was beginning to consider running for mayor to combat the obstruction he had faced in his role as auditor.

[8] His campaign promises included identifying budget savings in order to deliver a zero property tax increase in his first year as mayor,[8] reinstating the provincial ombudsman as the investigator of complaints about council activities,[8] and implementing new ethics guidelines for city councillors and staff modelled on the Vaughan Accord implemented by Vaughan mayor Maurizio Bevilacqua in 2011.

[10] In October 2022, he withdrew from the 2022 Greater Sudbury municipal election several weeks after having registered as a candidate, citing the need to spend more time with his family due to the declining health of his mother.