GSA PSS contract offers our federal and eligible state, local, and contractor clients a streamlined, simple contracting vehicle for procuring professional services offered on Contract No. GS-00F-397GA.   The GSA Professional Services Schedule (PSS) is an IDIQ multiple award schedule, providing direct access to simple or complex fixed-price or labor-hour professional services and makes it easy for our eligible customers to acquire professional services on a delivery-order basis at pre-negotiated prices.