Receives requisitions and reviews for completion and enters vendor number on requisition or assigns new vendor number. Determines which requisitions require a purchase order, contacts vendors for product availability and price, and assigns or secures purchase order number. Maintains vendor files and updates data as needed. Processes invoices and receives reports. Communicates with accounts payable to ensure proper payment of invoices. Provides technical customer service support to other departments and employees regarding purchasing and the purchasing system software. Conducts data entry into complex databases and systems and develops queries to gather information and prepare reports. May be responsible for entry of time records, payroll related documents, purchase orders, personnel action forms, budget documents, labor distribution reports, or any other procedural forms. May be assigned various accounting duties, or tasks related to accounting. May assist in preparing competitive bids. Performs other duties as assigned.