OASIS+ Contract Vehicle Guide
OASIS+ (One Acquisition Solution for Integrated Services Plus) is GSA's premier government-wide contract vehicle for professional services. With an unrestricted ceiling and broad scope, it is the successor to OASIS and one of the most important vehicles for services contractors to pursue.
100M+ government records · 300+ gov/news sources · Updated hourly
What is OASIS+?
OASIS+ is a family of government-wide, multi-award, indefinite-delivery/indefinite-quantity (MA-IDIQ) contract vehicles administered by the General Services Administration (GSA). It replaces the original OASIS contracts (awarded 2014) and is designed to serve as the primary acquisition solution for complex professional services across the federal government.
Unlike many contract vehicles, OASIS+ has no ceiling cap, meaning there is no limit on the total value of task orders that can be issued across the vehicle's life. This makes it one of the most attractive vehicles for large services firms, while dedicated small business pools ensure access for small and disadvantaged businesses.
OASIS+ uses a domain-based structure rather than the functional area approach of its predecessor. This gives agencies more flexibility to combine services across disciplines within a single task order, reducing the need for multiple contract vehicles on complex engagements.
OASIS+ Service Domains
OASIS+ organizes services into domains that correspond to NAICS code groupings. Contractors can compete for one or more domains based on their qualifications and past performance.
Management & Advisory
Management consulting, strategic planning, organizational development, financial advisory, and program management support services. Covers NAICS 541611, 541612, 541613, 541614, 541618.
Technical & Engineering
Engineering services, technical consulting, systems engineering, test and evaluation, and logistics support. Covers NAICS 541330, 541340, 541380, 541420, 541690.
Scientific
Research and development, scientific consulting, testing and laboratory services, and environmental science. Covers NAICS 541713, 541714, 541715, 541720.
Environmental
Environmental remediation, compliance consulting, waste management, environmental impact assessment, and sustainability services. Covers NAICS 541620, 562910, 562211.
Facilities
Facilities management, building operations, maintenance planning, space management, and related support services. Covers NAICS 561210, 561720, 561730.
Logistics
Supply chain management, transportation, warehousing, distribution, and acquisition logistics support services. Covers NAICS 541614, 488510, 493110.
Enterprise Solutions
Large-scale, complex solutions that span multiple domains. Designed for task orders requiring integration of services across traditional service boundaries.
Intelligence Services
Specialized services for the Intelligence Community including analysis, collection support, counterintelligence, and intelligence operations support requiring security clearances.
Small Business Pools
OASIS+ includes dedicated small business pools across all domains, ensuring that small businesses can compete for task orders on a level playing field. Each domain has separate pools for:
Open to all qualifying small businesses
SBA 8(a) certified firms
Historically Underutilized Business Zones
Service-Disabled Veteran-Owned Small Business
Women-Owned Small Business
Ordering agencies can direct task orders to specific small business pools, and many agencies have small business utilization targets that drive them to use these pools. For small businesses not yet on OASIS+, teaming arrangements with existing contract holders can provide access to task order opportunities as a subcontractor.
How to Compete for OASIS+ Task Orders
Winning work on OASIS+ requires both getting on the contract and successfully competing for individual task orders issued by federal agencies.
Step 1: Get on the Contract
OASIS+ uses an on-ramp model, meaning GSA periodically opens the contract for new entrants. Proposals are evaluated on past performance, relevant experience, systems and certifications, and accounting system adequacy. Having a DCAA-approved accounting system is important for cost-reimbursement task orders.
Step 2: Monitor Task Order Solicitations
Task orders are posted on the OASIS+ task order management system and SAM.gov. Agencies define their requirements, evaluation criteria, and contract type for each task order. Response windows can be as short as 15 days, making continuous monitoring essential.
Step 3: Submit Competitive Proposals
Task order proposals are typically evaluated on a best-value basis considering technical approach, management plan, past performance, and price. Unlike schedule orders, OASIS+ task orders support all contract types including cost-reimbursement, time-and-materials, and firm-fixed-price, allowing agencies to match the contract type to the work.
Step 4: Maintain Compliance
OASIS+ contract holders must maintain their qualifications, submit required reports, meet minimum task order volume thresholds, and maintain acceptable contractor performance assessment ratings (CPARS). Failure to meet these requirements can result in off-ramping.
Track OASIS+ Task Orders
Get real-time alerts when new OASIS+ task orders are posted that match your domain and capabilities. Never miss a task order opportunity again.
Sign Up Free