Johannesburg - Transnet board chairperson Popo Molefe will testify at the Zondo commission on Wednesday morning.
Molefe's testimony is expected to focus on corruption that has plagued Transnet over the past couple of years.
Molefe is one of several witnesses expected to testify at the commission in relation to the state-owned enterprise.
Like a number of other SOEs, Transnet is believed to have been targeted by the Gupta family and company's linked to it.
Advocate Paul Pretorius, the head of the commission's legal team, on Monday gave a broad overview of the evidence the commission will be probing over the next few weeks.