What is the ruling on working as an accountant for a company that was awarded a tender to manage a cafeteria owned by a usurious bank?

Your work as an accountant for a company contracted to manage a cafeteria for an interest-based bank is permissible. The company's contract for this cafeteria is also permissible, as it does not involve direct assistance or causation in the bank's usurious transactions. The utmost is that the company deals with one who possesses unlawful wealth, and the people of knowledge disliked this unless all of his wealth was unlawful, or the dealing was in the very unlawful item itself.