The General Services Administration is targeting on or about May 22, 2026, to issue formal awards and notices to proceed to qualified contractors under OASIS+ Phase II, according to GSA program office communications and industry briefings, following completion of final legal reviews. Phase II expands the One Acquisition Solution for Integrated Services Plus vehicle from eight professional services domains to thirteen, adding business administration, financial services, human capital, marketing and public relations, and social services — service areas that were not covered under the original OASIS+ solicitation structure. Alliant 3, GSA's companion information technology vehicle, completed Phase I awards in March 2026; the two vehicles together represent the primary pathway for professional and technology services work across the civilian agency market for the next decade.
What OASIS+ Covers and Why It Matters
OASIS+ is an indefinite-delivery, indefinite-quantity multiple-award contract vehicle that allows federal agencies to compete task orders for complex professional services without standing up their own vehicles. The vehicle's scope is deliberately broad: it covers management consulting, program management, logistics, engineering and scientific services, research and development, financial management, and now, under Phase II, the five additional domains. Unlike GSA's Multiple Award Schedules, OASIS+ requires an agency task-order contracting officer to compete requirements among vehicle holders rather than place direct orders, which means being on the vehicle matters but holding the contract does not guarantee work — firms must win task-order competitions within their domain pools.
The eight original OASIS+ domains opened for competition in 2023 and attracted thousands of proposals. GSA evaluated offerors on a combination of past performance, relevant experience in domain-specific NAICS codes, and other technical factors. Phase I awards established the pool of firms eligible to compete for task orders under each domain. Phase II solicitations, which were released for the five new domains and opened for competition in early 2026, will create separate pools for the new service areas, giving firms that did not compete in Phase I a pathway onto the vehicle without waiting for a future on-ramp.
New Domains and the Expanding Scope of OASIS+
The five new domains added in Phase II address professional services that federal agencies frequently procure but that were not well-represented in OASIS+'s original eight-domain structure. Financial services covers government financial advisory work including budget formulation, financial statement auditing support, and revenue collection management — work that was previously acquired through a mix of agency-specific vehicles and Schedule 520. Human capital covers workforce planning, organizational development, classification, and benefits administration support across the federal workforce. Business administration encompasses grant management, administrative support, and miscellaneous management services that do not fit cleanly into more specialized domain categories.
Marketing and public relations, one of the more politically sensitive additions given ongoing scrutiny of federal communications spending, covers public affairs, citizen engagement, and federal communications strategy work. Social services, the fifth new domain, covers human services delivery support including case management, program evaluation, and health and welfare program operations support. Together, the new domains bring OASIS+ into direct competition with a number of agency-specific IDIQ vehicles and GSA Schedule special item numbers that agencies have relied on for these service categories, potentially driving more efficient pricing through increased competition.
What It Means for Contractors
OASIS+ is now one of the two most important professional services vehicles in the federal government market alongside Alliant 3. Being on the vehicle is essentially table stakes for firms competing for mid- to large-value civilian agency professional services work. Phase II's NTPs around May 22 mark the beginning of task-order competition for the new domains, and firms awarded in Phase II should be prepared to respond quickly to early task orders as agencies migrate requirements from expiring agency-specific vehicles onto OASIS+.
- Firms awarded in Phase II should register their OASIS+ domain categories in SAM.gov and update their Capabilities Statement immediately following NTP receipt; agency contracting officers use GSA's eBuy and OASIS+ repository to identify pool members when structuring task-order competitions.
- For firms that did not compete in Phase I or Phase II, GSA has stated its intent to hold continuous open-season on-ramps for OASIS+ — monitor GSA's Interact platform and the OASIS+ program page for future on-ramp solicitation announcements, as the next opening may be later in 2026 or in FY 2027.
- Task orders under OASIS+ are competed among domain pool members; past performance on similar government work, competitive labor rates, and a track record of managing complex multi-disciplinary task orders are the key differentiators in agency source selection decisions.
- Alliant 3 Phase I awards were issued in March 2026; firms holding both OASIS+ and Alliant 3 contracts have the broadest access to the federal professional and technology services market, which represents more than $80 billion in annual federal spending when including civilian and defense task orders.
- Small businesses should note that OASIS+ includes separate small business pools for each domain — awards in small business pools give eligible firms a competitive advantage when agencies specifically set aside task orders for small businesses, 8(a), HUBZone, SDVOSB, or WOSB participants.
On-Ramp Timeline and What Firms That Missed Phase II Should Do Now
GSA has signaled that OASIS+ will feature continuous open-season on-ramps — periodic competitive opportunities for firms that did not participate in Phase I or Phase II to join the vehicle without waiting for a full recompete. The first on-ramp solicitations are expected no earlier than late FY 2026 or early FY 2027, depending on GSA's workload following the Phase II award process and any protests that may be filed against Phase II award decisions. Firms that did not compete in Phase II should begin preparing their OASIS+ applications now, assembling relevant past performance citations, identifying NAICS codes within the domain pools that best match their capabilities, and ensuring their SAM.gov registrations and capability statements are current. Because OASIS+ is a best-value vehicle evaluated on past performance and relevant experience rather than price alone, the quality of a firm's past performance narrative is the primary determinant of whether it qualifies for a pool award; firms should invest proportionally in curating their performance record before the next solicitation opens. Task order competition will begin in earnest as agencies start moving requirements off expiring vehicles and onto OASIS+ through FY 2026 and FY 2027; firms that hold Phase I or Phase II awards should be actively monitoring eBuy for task order solicitations in their domain pools rather than waiting for agency contacts to reach out directly.