See attached Sources Sought Notice and draft Performance Work Statement for full details. The Defense Information Systems Agency (DISA) is seeking sources to provide full life-cycle application management for their Legacy Systems. This requirement is for full life-cycle application management of the Legacy System. The Legacy System primarily consists of Contract Support System (CSS), Contractual Online Procurement System (COPS), Financial Accounting and Budget System (FABS), and the Defense Information Technology Contracting Organization (DITCO) Web. This also includes other subsystems, such as: Rates and Tariffs File System (RTFS), Joint Hawaii Information Transfer System (JHITS), the Delivery Ticket Invoicing (DTI) process, Accounting & Audit Operations Office (CFA) Accounts Payable (A/P) Validation, Procurement Services (PS) A/P Validation, Information Technology (IT) Contract Closeout, Inquiry Quote Order (IQO) Contract Closeout, Telecom Voucher Management, and the European Voucher Module. Anticipated Period of Performance: June 10, 2027 – June 9, 2032