Working knowledge in reading and interpreting various types of company forms, transfer and purchase documents, freight bills and invoices, inventory lists, stock-out reports, manuals, computer print outs, stores documents, purchase requisitions, supplier packing lists, job orders, and manuals. Headquartered in Tulsa, Okla., its divisions include Kansas Gas Service, the largest natural gas distributor in Kansas; Oklahoma Natural Gas, the largest in the state; and Texas Gas Service, the third largest in the state in terms of customers.