For commercial questions, suppliers should contact their identified buyer directly. For general questions regarding purchasing policies or for contract implementation issues, suppliers should contact their regional purchasing representative.
For transactional questions, suppliers should contact their service center using the phone number listed on the purchase order.
The PSC is responsible for the transactional aspect of purchasing (key punching, purchase orders, and payment entries, for example). Suppliers will be contacted by the PSC in the event corrections or updates to purchase orders are needed.
Site Purchasing is responsible for contract implementation issues. Examples might include customer/supplier relationships, supplier performance, and damaged goods. Trinseo employees also contact Site Purchasing regarding the possibility of using other suppliers.