OASIS+ (One Acquisition Solution for Integrated Services Plus) is a next-generation, government-wide, multiple-award contract vehicle developed by the U.S. General Services Administration (GSA). It is a follow-on to the original OASIS contract and is designed to expand and modernise the federal government’s ability to acquire complex, non-IT professional services through a more flexible and mission-aligned structure.
Whereas the original OASIS focused on a set of predefined domains and structures, OASIS+ introduces new service domains, updated evaluation criteria, and an open-ended ordering period intended to support long-term contracting strategies across civilian and defence agencies.
Purpose and Strategic Importance of OASIS+
OASIS+ is intended to provide a comprehensive contracting vehicle for federal agencies in need of a wide range of non-IT services. These services often support high-priority missions involving research, logistics, program management, engineering, financial consulting, and beyond.
GSA’s objectives with OASIS+ include:
- Expanding access to best-in-class professional services
- Simplifying the procurement process for agencies and vendors
- Increasing participation by small and disadvantaged businesses
- Aligning contract categories with modern federal missions
- Supporting long-term planning and multi-agency acquisition strategies
OASIS+ is not just a replacement for OASIS; it is a re-engineering of the federal approach to acquiring professional services.
Key Differences Between OASIS and OASIS+
While OASIS laid the foundation for integrated services procurement, OASIS+ makes critical structural and operational updates:
| Feature | OASIS (Legacy) | OASIS+ (Modernised) |
|---|---|---|
| Number of Domains | 7 | Expanded with more domains |
| Contract Type | IDIQ with set expiration | Open-ended MA-IDIQ |
| On-ramping | Limited | Continuous on-ramping allowed |
| Small Business Integration | Fixed pools | Broader, with focus on equity |
| Cybersecurity and ESG Criteria | Minimal | Explicitly included |
| Evaluation Process | Traditional source selection | Scorecard-based qualification |
These changes reflect evolving procurement needs, national priorities, and market conditions.
What Services Can Be Acquired Through OASIS+?
OASIS+ covers a broad range of non-IT professional services. GSA has organised the contract into multiple Domains, which represent logical groupings of services. These domains include:
- Management and Advisory Services
- Technical and Engineering Services
- Research and Development (R&D)
- Logistics Services
- Facilities Support
- Intelligence Services
- Financial Management
- Healthcare Services
- Environmental Services
Each domain includes both unrestricted and set-aside tracks (e.g. for small businesses, 8(a), WOSB, SDVOSB), enabling tailored competition and increased participation from underrepresented vendors.
Who Can Use OASIS+?
OASIS+ is a multi-agency contract (MAC), meaning that it is open for use by:
- Civilian agencies (e.g. DHS, EPA, DOE, VA)
- Department of Defense (all branches)
- Independent government commissions and boards
Agencies can issue task orders through OASIS+ to acquire mission-critical services without establishing separate contracts. Use of OASIS+ requires delegated procurement authority and compliance with ordering procedures established by GSA.
Advantages of OASIS+ for Federal Agencies
OASIS+ provides numerous advantages to federal buyers:
- Streamlined Procurement: Pre-vetted vendors and pre-negotiated terms reduce acquisition timelines.
- Mission Alignment: Contract structure is tailored to support long-term and complex needs.
- Flexible Contracting Terms: Supports cost-reimbursement, fixed-price, and hybrid arrangements.
- Transparency and Oversight: Standardised ordering and pricing ensure consistency.
- Strategic Sourcing: Enables category management and bundling of services across missions.
For agencies pursuing large-scale, integrated service solutions, OASIS+ offers a unified acquisition framework.
Benefits of OASIS+ for Contractors
Vendors awarded an OASIS+ contract can benefit from:
- Government-wide visibility across all federal agencies
- Reduced need for multiple agency-specific contracts
- Eligibility to compete for high-value task orders
- Access to multi-year, recurring business opportunities
- Opportunities across multiple domains
Small businesses, in particular, gain from dedicated set-aside tracks and streamlined qualification requirements.
Evaluation and Qualification Process
OASIS+ uses a self-scoring qualification model, where offerors submit documentation of their capabilities, experience, and certifications across defined evaluation criteria. Points are awarded for:
- Relevant past performance
- Technical certifications or accreditations
- Systems and clearances (e.g. facility clearance, accounting systems)
- Industry recognitions
- Socioeconomic designations
Vendors meeting the point threshold for a given domain are awarded a contract in that area, pending responsibility determination and administrative review.
This process eliminates lengthy narrative proposals and focuses on objective readiness metrics.
Ordering and Contract Structure
OASIS+ is a Multiple Award IDIQ (MA-IDIQ) contract with:
- No ceiling value — unlike many federal contracts, OASIS+ has no upper dollar limit
- 10-year base ordering period, with optional extensions
- Flexible pricing models, including firm-fixed-price, T&M, cost-plus, etc.
- Delegated ordering authority to authorised agencies
- Robust reporting and compliance mechanisms
Task orders under OASIS+ must comply with FAR Subpart 16.5, including fair opportunity procedures.
Considerations for Agencies Using OASIS+
Before placing orders on OASIS+, federal agencies must ensure:
- Proper acquisition planning
- Funding availability and obligation
- Compliance with socioeconomic and competition requirements
- Clear Statement of Work (SOW) and performance metrics
- Delegation of procurement authority (if applicable)
GSA provides training and guidance documents to assist contracting officers and program managers.
Checklist for Prospective Offerors
Businesses interested in competing for OASIS+ should prepare by:
- Reviewing domain qualification criteria
- Compiling past performance and contract references
- Obtaining facility and accounting clearances
- Evaluating eligibility for small business set-asides
- Developing a compliance plan for cybersecurity, sustainability, and reporting
- Monitoring SAM.gov and GSA Interact for updates
Early preparation is key, especially given the scale and competitiveness of the contract.
Conclusion: OASIS+ as a Future-Proof Acquisition Platform
OASIS+ is more than a follow-up to a successful contract — it represents a modern acquisition architecture designed to support the evolving needs of federal missions. With expanded domains, continuous vendor onboarding, and performance-based evaluation, it creates new opportunities for agencies and contractors alike.
As agencies look to streamline acquisition, leverage private-sector innovation, and meet strategic sourcing goals, OASIS+ will serve as a critical tool in the federal procurement ecosystem.
