The House of Commons ethics committee will hear from Youth Minister Bardish Chagger Tuesday.
The committee is probing the decision to give WE Charity the contract to administer the $912 million student grant program, which has now been abandoned.
Employment Minister Carla Qualtrough and Ian Shugart, clerk of the Privy Council, will also appear.
Qualtrough is in charge of the department whose public servants concluded they were not capable of delivering the program.
According to the government, it was this department that recommended WE Charity was the only group able to deliver it.
Prime Minister Justin Trudeau and Finance Minister Bill Morneau both have ties to the charity and are under investigation by the federal ethics commissioner.
They have apologized for failing to recuse themselves when cabinet approved the recommended agreement with the charity.
The federal Liberals are also facing more ethical questions around the delivery of the rent relief program for small businesses during the COVID-19 pandemic.
The government handed responsibility for the program to the Canada Mortgage and Housing Corporation.
The Crown corporation decided to contract it out to MCAP, a mortgage lender that employs the husband of Trudeau’s chief of staff Katie Telford.
The Prime Minister’s Office says CMHC independently chose to outsource the program.
The office says Telford voluntarily set up an ethics screen to ensure she would not be involved in anything that might benefit the company.