As directed by the COR, assist in the monitoring and tracking of invoice payment schedules; Processing all incoming invoices to the COR for review and approval, ensuring compliance with the Prompt Payment Act; Support the COR in meeting with government personnel and contractor personnel as appropriate on invoicing issues and procedures; Maintaining TO/DO/PO databases for modifications and award fees; Assist in COR receiving and forwarding deliverables to Configuration Management; Assist COR in preparing/coordinating preparation and issuance of Deliverable Response Letters; Assist COR in preparing contract/TO closeout, closeout reports, and supporting artifacts; and. Duties and Responsibilities: As directed by the CO, receipt and distribution of proposals to Business Managers and sub-CORs; As directed by the CO, assist in the preparation of Solicitations, Task Orders (TOs), Delivery Orders (Dos), and/or Purchase Orders (POs); As directed by the CO, assist in the preparation of modifications to TOs, DOs, and/or POs; As directed by the CO, review contractor notifications and requests for consent to subcontract; and.