A former Frankston City Council manager has been sentenced to 12 months imprisonment for obtaining property by deception and misconduct in public office.

Victoria’s County Court handed down the sentence this week after an investigation by the Independent Broad-based Anti-corruption Commission (IBAC) into the actions of former manager Andrew Williamson, and a series of fraudulent invoices worth more than $460,000.

Mr Williamson was found to have filed dodgy invoices on behalf on an electrician for work that may not have been done, or had its value fraudulently inflated. The invoices were filed over the course of eight months in 2016-17.

Mr Williamson used the money to pay off debts, invest in an ultimately failed business venture, and assist his partner.

He pleaded guilty to misconduct in public office, obtaining property by deception and attempting to obtain property by deception.

IBAC’s investigation was triggered by a mandatory notification from Frankston City Council, which all Victorian councils are required to send out when public sector departments or agencies suspect corrupt conduct.