Submit an offer to OASIS+

Understand the portals

• Symphony Portal (OSP): Used for offerors’ proposal submissions under the OASIS+ suite of contracts for government proposal evaluations.
• GSA eBuy: Used only for task order solicitations and management on already awarded OASIS+ contracts.

1. Register in Symphony

   All sellers who are interested in submitting proposals to the OASIS+ suite of contracts must register in Symphony Portal for submitting OASIS+ proposals:

   • Requirement: You must have your company’s SAM.gov Unique Entity ID (UEI).
   • Guides: Review “How to register as a business user” and “How to sign into Symphony” in the Knowledge Base.

2. Prepare Your Proposal

   The Symphony Vendor Support Guide provides step-by-step instructions for each phase of the process. Under the “GSA Contract Vehicle Supplements” section, locate the OASIS+ section that covers the entire lifecycle of the OASIS+ offer:

   • Setting Up Your OASIS+ Assets
   • Scoring and Verifying Your OASIS+ Projects
   • Finalizing and Submitting Your OASIS+ Proposal
   • Managing Post-Award and Contract Administration

3. Submit your offer

   • Submit your proposal directly through the OASIS+ Submission Portal (OSP)

4. After submission 

   Once submitted, the OASIS+ Contracting Office will evaluate your offer against Section M of the solicitation (including pricing and responsibility reviews).

   • Clarifications: The team may contact you for clarifications. Please keep your Company Contract Manager/Company Program Manager (COCM/COPM),  to ensure you receive these messages.
   • Outcome: You will receive either an Award Notice or a debriefing letter if unsuccessful.

Need help?

• See the “FAQ and Questions/Answers” under the Solicitations Continuously Open page.