If you work at a staffing agency or manage vendors for one, you've likely heard the term VMS thrown around. But what is a VMS in staffing, exactly, and does your agency actually need one? A Vendor Management System (VMS) in staffing is a software platform that helps organizations centralize how they source, manage, engage, and pay contingent workers and the staffing vendors who supply them. In short, it sits between the employer (the buyer of labor) and the staffing agencies