Transline Group's finance director Jennifer Hardy will be grilled by the committee for business, energy and industrial strategy (BEIS) on Tuesday. It is thought Iain Wright MP, head of the committee, will ask Hardy about the company's involvement with both Sports Direct and Amazon.
The hearing will also be attended by Unite's assistant general secretary, Steve Turner, who will talk about agency workers' rights, and Amazon's use of agency workers.
GMB general secretary Tim Roache will also be quizzed by the panel of MPs and is expected to talk about Asos, the online retailer that has faced questions over how it treats its warehouse staff.
Hardy appeared before MPs in June last year to answer questions about Transline's role in the scandal engulfing Sports Direct's Shirebrook warehouse. Hardy defended Transline's use of a controversial strike policy for punishing staff, and was heavily criticised by Wright, who later claimed she had mislead MPs when she said Transline had lost its gangmaster licence over an "administrative error".
Asos has denied accusations that its staff work under poor conditions in its Barnsley warehouse. The e-commerce business said in a statement last October that it wouldn't be "practical" to act like an "employer from the Victorian times".