One Acquisition Solution for Integrated Services (OASIS)

GSA Federal Acquisition Service established OASIS (One Acquisition Solution for Integrated Services), a master IDIQ with a $1 trillion combined ceiling, on February 24, 2014, but the vehicle's ordering period closed on March 1, 2025. New task orders can no longer be placed against OASIS, making it unsuitable for prospective pursuits. However, a successor vehicle or on-ramp opportunity may exist; the source documents reference OASIS SB Pools 1, 3, and 4, indicating the vehicle operates in multiple small-business and unrestricted pools, though details on active successor vehicles are not provided.

OASIS historically contracted complex integrated professional services involving multiple disciplines, significant IT components blended with non-IT work, ancillary supplies and services (ODCs), and commercial or non-commercial offerings. Task orders across the portfolio show actual execution in program management, systems engineering, data analytics, financial operations, logistics, environmental remediation, strategic communications, and R&D across aerospace, defense, health, and civilian agencies. Eight subcategories span financial/accounting services, management/scientific/technical services, multiple R&D domains (aircraft, space and missiles, scientific), and military/marine/energy engineering.

A small set of large contractors dominated the vehicle by value: Science Applications International Corporation, Booz Allen Hamilton Inc., and HII Mission Technologies Corp held 47 percent of the $91.79 billion combined potential value across roughly one quarter of the awardee base. Booz Allen Hamilton led by order count at 166 awards ($13.3 billion potential), followed by Deloitte Consulting LLP (129 orders, $2.9 billion) and Leidos, Inc. (86 orders, $5.07 billion). The long tail of 107 distinct primes extended to smaller systems integrators and specialized R&D firms.

Funding was highly concentrated in defense and civilian agencies. The Army Materiel Command Research Development and Engineering Command (56 orders, $7.64 billion), Navy Bureau of Medicine and Surgery (52 orders, $614.3 million), Air Force Air Combat Command (47 orders, $842.6 million), and HHS Centers for Disease Control and Prevention Pittsburgh (75 orders, $613.5 million) anchored demand. Over 228 customer agencies placed orders, but the top five customers represented 18 percent of task order count.

All 1,504 awarded task orders carried no set-aside designation; the vehicle operated as an unrestricted multiple-award contract. Four task orders bore a Total Small Business set-aside marker, an administrative anomaly.

Task orders ranged from sub-million-dollar fixed-price contracts for ongoing operational support to mega-orders exceeding $200 million. Representative recent awards included: a $467.3 million cost-plus-award-fee order to U.S. Indo-Pacific Command for enterprise professional services (awarded March 2025); a $238.8 million firm-fixed-price order for Space Force command-and-control software infrastructure (January 2025); a $225.9 million cost-plus-award-fee order for major command support (September 2024); and a $162.4 million firm-fixed-price order for F-22/F-35 engineering and administrative services (September 2024). Smaller orders for monthly accounting support ($540 thousand), financial reporting ($4.95 million ceiling), and specialized research support populated the portfolio. Typical task order durations extended 2 to 5 years from award. The vehicle obligated $54.12 billion of its $91.79 billion potential value (59 percent) before closing to new orders. Ordering momentum remained steady at 140–170 orders per year through 2024; only 34 orders were placed in calendar 2025 after the March 1 cutoff.

Task orders are performed worldwide, with administrative oversight and customer locations spanning domestic bases, overseas installations, and hostile areas. Concentration by geographic performance site was not reported.

The purpose of OASIS is to meet the needs of customers with complex integrated professional service based requirements who cannot use, or find difficulty using, the MAS Schedules, Government-wide Acquisition Contracts (GWACs), or other existing vehicles for a solution. Complex integrated professional services based requirements are those that: -Involve multiple professional services disciplines; -Involve significant IT components, but are not IT requirements; -Involve ancillary support services and supplies (commonly referred to as Other Direct Costs - ODCs); -Involve commercial or non commercial services, or a blend of both;