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OASIS+ is ready to meet your agency’s complex, integrated multiple service requirements. The Buyers’ Guide is designed to make buying a smooth and streamlined process, with resources for every part of your journey. Explore the guide below or view the OASIS+ Buyers’ Ordering Guide (printable).
This Buyers’ Guide explains how the OASIS+ contracts can be used to satisfy a wide variety of services requirements. It does not address general contracting issues or concepts unless necessary for complete understanding.
On September 17, 2025, the GSA’s Office of Professional Services and Human Capital Categories (PSHC) announced a new group of apparent contract awardees for the OASIS+ 8(a) contract on SAM.gov. Formal awards and Notices to Proceed (NTP) for this group of 8(a) rolling awards are planned for September 30, 2025.
On September 9, 2025 the GSA’s Office of Professional Services and Human Capital Categories (PSHC) announced a new group of apparent contract awardees for five OASIS+ contracts posted on SAM.gov. Formal awards and Notices to Proceed (NTP) for this group of rolling awards are planned for September 23, 2025. Click on the links below to learn more:
On August 19, 2025 the GSA’s Office of Professional Services and Human Capital Categories posted responses to questions received from the services provider community within Industry about OASIS+ Phase II Domains and the request for information (RFI) that closed on July 8, 2025. Learn more and review the Q&As on the blog posted on the OASIS+ Interact Community.
For additional information, check out:
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Rates for Alaska, Hawaii, and U.S. territories and possessions are set by the Department of Defense.
Rates for foreign countries are set by the Department of State.
Rates are available between 10/1/2023 and 09/30/2026.
The End Date of your trip can not occur before the Start Date.
Traveler reimbursement is based on the location of the work activities and not the accommodations, unless lodging is not available at the work activity, then the agency may authorize the rate where lodging is obtained.
Unless otherwise specified, the per diem locality is defined as "all locations within, or entirely surrounded by, the corporate limits of the key city, including independent entities located within those boundaries."
Per diem localities with county definitions shall include"all locations within, or entirely surrounded by, the corporate limits of the key city as well as the boundaries of the listed counties, including independent entities located within the boundaries of the key city and the listed counties (unless otherwise listed separately)."
When a military installation or Government - related facility(whether or not specifically named) is located partially within more than one city or county boundary, the applicable per diem rate for the entire installation or facility is the higher of the rates which apply to the cities and / or counties, even though part(s) of such activities may be located outside the defined per diem locality.
U.S. General Services Administration