Adem Somyurek will appear as a witness over four days this week from Monday to Friday, excluding Wednesday when no public hearings are scheduled.
Mr Somyurek quit the Labor Party last year before he was expelled following a Nine Network investigation, which caught him handing over cash and using parliamentary staff to create fake branch members.
The practice, known as branch stacking, was allegedly carried out to boost his moderate faction's influence and ensure preferred candidates were preselected. It is not illegal but it is against Labor party rules.
An Independent Broad-based Anti-corruption Commission inquiry is investigating whether taxpayer funds, and money intended for community associations, was used.
Former gaming minister Marlene Kairouz did not give evidence in public before the inquiry last week, after her electorate officer Kirsten Psaila admitted the MP transferred $60,000 to her between 2015 and 2020 to pay for memberships.
Despite being on the witness list, counsel assisting the inquiry Chris Carr SC said the commission had received "credible evidence" of concern for Ms Kairouz's wellbeing if she was examined in public.
Ms Kairouz, who was a key factional ally of Mr Somyurek, resigned from cabinet last year but remains on the government backbench.
Previously, the inquiry has heard Mr Somyurek and another political protege accused journalists of racism in an effort to stop them from investigating taxpayer-funded grants awarded to their factional allies.
His former staffer Adam Sullivan also told IBAC last month he spent up to $14,000 from Mr Somyurek's electorate office budget on stamps for Mordialloc MP Tim Richardson's 2018 re-election campaign.
Mr Somyurek and Ms Kairouz deny wrongdoing.
