OASIS+ Unrestricted Continuously Open Solicitation for Integrated Services

This amendment reopens the One Acquisition Solution for Integrated Services Plus (OASIS+) Unrestricted solicitation, allowing for rolling admissions and continuous open solicitation. The General Services Administration (GSA) Federal Acquisition Service (FAS) is seeking proposals for a wide range of services across multiple domains, including management and advisory, technical and engineering, research and development, intelligence services, enterprise solutions, environmental, facilities, logistics, business administration, marketing and public relations, human capital, financial services, and social services. This is an Indefinite-Delivery, Indefinite-Quantity (IDIQ) contract available for use by all Federal agencies. Offerors must be registered in SAM.gov and submit proposals through the OASIS+ Symphony Portal (OSP). The solicitation is continuously open, with no fixed timeline for award, and allows for the on-ramping of new contractors and the competition for additional domains as government needs evolve. Should GSA determine a need to close any domain or solicitation vehicle, the agency will provide public notification. Offerors are permitted to submit a single proposal for multiple domains under a single solicitation. There is no fixed timeline for award; timelines will vary based on the volume of proposals received and are subject to resource availability. Offerors must be registered and active in SAM.gov. All proposals must be submitted through the OASIS+ Symphony Portal (OSP). The OSP is open for registration and submission of offers as of January 12, 2026. Registration information and submission instructions are provided at https://oasis.app.cloud.gov/. For questions related to registration or technical issues, offerors can contact client.support@apexlogic.com. Industry is instructed to review the solicitation requirements posted to SAM.gov before submitting an offer. Offerors will be required to acknowledge Amendment 0008 as part of their offer submission. The OASIS+ CO is the sole point of contact for all questions under this solicitation. Industry is welcome to submit any questions after carefully reviewing the RFP and registering in the OSP. Offerors must submit all questions regarding the solicitation via the OSP. GSA reserves the right to publicly discuss and publish, or simply consider, questions and comments regarding the RFP. Offerors are solely responsible for reviewing and staying current with the solicitation and all amendments posted on SAM.gov. In the event of a conflict, the solicitation and amendments posted to this notice on SAM.gov take precedence over any information contained on other websites or prior communications. Any clarification that changes solicitation requirements will be issued, as appropriate, through a solicitation amendment. To stay connected, join the OASIS+ Interact Community and follow us on X and LinkedIn (linked at the bottom of this post).