OASIS+ and GSA eBuy: How to Find and Win Task Orders on the Government's $60B+ Professional Services Vehicle
Legacy OASIS generated $35 billion in obligations over its lifetime and fundamentally changed how agencies buy professional services. Its successor, OASIS+, is designed to absorb even more — consolidating legacy OASIS, HCaTS, and BMO into a single Best-in-Class vehicle with 13 service domains, no spending ceiling, and a continuous on-ramp that's been open since January 2026. Every task order solicitation flows through one portal: GSA eBuy. If you're a professional services contractor who isn't watching eBuy daily, you're already missing work. Here's how the system works — and how to stop relying on manual monitoring to find your next win.
TL;DR
- OASIS+ is GSA's governmentwide Best-in-Class IDIQ for non-IT professional services — now expanded to 13 domains with no spending ceiling and over 4,100 contract awards to date.
- Phase II launched January 12, 2026 with continuous on-ramps and five new domains (Business Administration, Financial Services, Human Capital, Marketing & Public Relations, Social Services). No fixed submission deadlines.
- GSA eBuy is mandatory. Every OASIS+ task order solicitation must be posted through eBuy. It's the sole authorized system for fair opportunity notification and proposal submission.
- Legacy OASIS ordering ended March 2025. Agencies are now routing professional services spend onto OASIS+ — and Executive Order 14240 is accelerating that consolidation.
- The contractor challenge: eBuy sends email notifications, but there's no intelligent matching, no competitive context, and no connection to your capture workflow. You're monitoring and reacting, not strategizing.
- CLEATUS integrates directly with GSA eBuy — automatically importing OASIS+ task orders and MAS RFQs into your pipeline with AI-powered matching, solicitation analysis, and proposal tools. No more missed opportunities buried in your inbox.
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What Is OASIS+ and Why It Matters in 2026
OASIS+ — One Acquisition Solution for Integrated Services Plus — is GSA's governmentwide, multiple-award IDIQ contract suite for non-IT professional services. It's designed to be the single vehicle through which federal agencies purchase complex professional services: management consulting, engineering, environmental services, logistics, scientific research, program support, transportation, and as of Phase II, financial services, human capital, marketing, business administration, and social services.
The scale is significant. Legacy OASIS accumulated $35 billion in obligations across nearly 200 contractors. OASIS+ is built to absorb that spending and more — there is no total contract ceiling, no limit on the number of awards, and a 10-year ordering period (five-year base plus one five-year option). One industry estimate pegs the vehicle at $60 billion or more in projected value.
What Changed with Phase II
On January 12, 2026, GSA launched Phase II of OASIS+, which changed three things that matter to contractors:
Five new service domains. The original eight domains — Management and Advisory, Technical and Engineering, Scientific, Environmental, Logistics, Program Support, Intelligence Services, and Transportation — were joined by Business Administration, Financial Services, Human Capital, Marketing and Public Relations, and Social Services. This brings the total to 13, covering a much wider swath of the professional services market.
Continuous on-ramp. Phase II eliminated fixed submission deadlines. All six OASIS+ solicitations (one Unrestricted, five small business set-aside tracks) are now continuously open. You submit when you're ready. GSA evaluates as proposals arrive and awards contracts on a rolling basis. If you missed Phase I or want to compete in additional domains, the door is open.
Procurement consolidation mandate. Executive Order 14240, "Eliminating Waste and Saving Taxpayer Dollars by Consolidating Procurement," directs federal agencies to retire redundant contract vehicles and route spending through centralized, Best-in-Class vehicles like OASIS+. This isn't an abstract policy directive — it means billions in agency-specific IDIQ spending is actively migrating onto OASIS+.
The Six OASIS+ Contract Pools
OASIS+ operates through six distinct IDIQ contracts, each with its own set of awardees:
| Pool | Eligibility | Key Detail |
|---|---|---|
| Unrestricted | Full and open competition | ~700 awards to date; qualifying projects must average $1M+/year |
| Total Small Business | SBA-certified small businesses | Qualifying projects must average $500K+/year |
| 8(a) | SBA 8(a) certified firms | Supports competitive 8(a) set-asides and directed task orders |
| SDVOSB | Service-Disabled Veteran-Owned SBs | Includes VOSB-certified contractors |
| WOSB | Women-Owned Small Businesses | Includes EDWOSB eligibility |
| HUBZone | HUBZone-certified firms | Price evaluation preference applies |
All six pools share the same 13 service domains and route task orders through the same system: GSA eBuy. The pool determines who gets notified and who can compete. The domain and NAICS code determine the scope.
The 13 OASIS+ Domains
Each domain groups related NAICS codes and defines the scope of services contractors can compete for. Understanding which domains align with your capabilities is the first step in your OASIS+ strategy — whether you already hold a contract or you're preparing an on-ramp submission.
| Domain | Phase | Description | Example Services |
|---|---|---|---|
| Management and Advisory | Phase I | Strategic planning, organizational development, change management, and executive advisory services | Management consulting, acquisition support, policy analysis |
| Technical and Engineering | Phase I | Professional engineering services including design, analysis, and technical support across civil, mechanical, electrical, and systems engineering | Systems engineering, test & evaluation, technical analysis |
| Scientific | Phase I | Research and development, scientific analysis, and applied research across multiple disciplines | R&D, scientific consulting, laboratory services |
| Environmental | Phase I | Environmental assessment, remediation, compliance, sustainability planning, and natural resource management | Remediation, NEPA compliance, sustainability consulting |
| Logistics | Phase I | Supply chain management, distribution, warehousing, transportation planning, and inventory control | Supply chain ops, warehouse management, deployment support |
| Program Support | Phase I | Program management, administrative support, project coordination, and operational assistance | PMO support, training delivery, organizational development |
| Intelligence Services | Phase I | Intelligence analysis, counterintelligence, and specialized analytical support for national security missions | Intelligence analysis, counterintelligence, SIGINT support |
| Transportation | Phase I | Transportation planning, traffic engineering, transit systems, fleet management, and mobility solutions | Fleet management, transit planning, transportation analysis |
| Business Administration ✦ | Phase II (New) | Administrative management, business operations support, office management, and data services | Administrative support, language services, document management |
| Financial Services ✦ | Phase II (New) | Financial management, accounting, budgeting, auditing, loan servicing, and fiscal analysis | Accounting, budgeting, financial advising, asset management |
| Human Capital ✦ | Phase II (New) | Workforce development, training, talent management, HR consulting, and organizational capability building | HR services, workforce development, talent acquisition |
| Marketing and Public Relations ✦ | Phase II (New) | Strategic communications, brand management, public affairs, media relations, and campaign services | Public affairs, communications strategy, event management |
| Social Services ✦ | Phase II (New) | Community support, social program management, case management, and human services delivery | Social work, counseling, community development |
Note on Phase II domain availability: As of March 2026, the five new domains are in the award pipeline — GSA is evaluating proposals and issuing awards on a rolling basis. Some Phase II domains may not yet be available for task order solicitations. Monitor the OASIS+ Interact Community and GSA eBuy for domain availability updates.
How GSA eBuy Works — and Why It's the Center of the OASIS+ Universe
Here's the critical fact that every OASIS+ contractor needs to internalize: GSA eBuy is the only authorized method for issuing and responding to OASIS+ task order solicitations. It's not optional. It's not one channel among many. It's the system.
GSA eBuy is an online procurement platform that allows federal agencies to post task order solicitations (RFPs, RFQs, and RFIs) and receive proposals from contractors holding the appropriate contract vehicles. For OASIS+, using eBuy to broadcast a solicitation to all qualifying contract holders within a given domain and NAICS code satisfies the fair opportunity notification requirement under FAR 16.505.
What Happens on eBuy
Agencies post task order solicitations. An Ordering Contracting Officer (OCO) with Delegation of Procurement Authority creates a task order solicitation in eBuy, selects the OASIS+ contract family, domain, and NAICS code, and attaches the solicitation documents — Performance Work Statement, evaluation criteria, and any supplementary materials.
Contractors get notified. eBuy sends automated email notifications to contract holders whose awarded pools and domains match the solicitation. You only see task orders that match your specific contract awards — if you hold OASIS+ Small Business with awards in Management and Advisory and Logistics, you won't see task orders in Environmental or Scientific.
Proposals are submitted through eBuy. Contractors respond to solicitations directly in the portal. eBuy captures the entire proposal submission, creating a database of record for audit and compliance purposes.
Awards are recorded. OCOs report task order awards through eBuy, and the data feeds into FPDS for public reporting.
What eBuy Also Covers (Beyond OASIS+)
eBuy isn't exclusive to OASIS+. It's also the portal for task orders and RFQs under the GSA Multiple Award Schedule (MAS) program and other GWACs. If you hold a GSA Schedule, you're already using eBuy — or should be — to find and respond to Schedule-specific RFQs matching your Special Item Numbers (SINs).
This is important context because many professional services contractors hold both a GSA Schedule and an OASIS+ contract. Both vehicles route work through eBuy, but they serve different purposes: GSA Schedules are typically used for simpler, commercial-type service purchases with pre-negotiated pricing, while OASIS+ is designed for complex, integrated professional services requirements that often span multiple disciplines and use cost-reimbursement or time-and-materials contract types.
The OASIS+ Task Order Lifecycle: From RFI to Award
Understanding how task orders move through the system is essential for positioning yourself to win. Here's the flow:
Step 1: Agency Market Research
Before issuing a formal solicitation, many agencies post Requests for Information (RFIs) on eBuy to gauge contractor interest and refine their requirements. RFIs aren't solicitations — you won't win a contract by responding to one — but they're strategically valuable. Responding to an RFI signals interest, provides an opportunity to shape the procurement, and helps determine whether the requirement will be set aside for small business.
Step 2: Task Order Solicitation
The OCO creates the solicitation in eBuy using the OASIS+ Task Order Solicitation Template. The solicitation identifies the contract family, domain, NAICS code, contract type (FFP, T&M, cost-reimbursement, or hybrid), period of performance, and evaluation criteria. All qualifying contract holders in the relevant pool and domain are notified.
Step 3: Proposal Submission
Contractors submit proposals through eBuy. Response timelines are typically 7–30 days depending on complexity. The solicitation documents — PWS, Section L instructions, Section M evaluation criteria — are attached to the eBuy posting and downloaded by contractors directly from the system.
Step 4: Evaluation and Award
The OCO evaluates proposals using the task-order-level evaluation criteria (not the OASIS+ master contract criteria — those were used to qualify you for the vehicle). Awards are reported through eBuy and FPDS.
Step 5: Performance and CPARS
Performance on each task order is documented in the Contractor Performance Assessment Reporting System (CPARS). Strong CPARS ratings on OASIS+ task orders become past performance evidence for future task order competitions — both on OASIS+ and other vehicles.
The compounding effect: Every OASIS+ task order you win generates past performance, deepens agency relationships, and positions you for future work on the vehicle. Contractors who win early on OASIS+ are building a competitive moat — and the contractors who aren't monitoring eBuy closely enough to respond are falling further behind with every missed solicitation.
The Real Problem: eBuy Is a Transaction System, Not a Strategy Tool
Let's be direct about what using eBuy is actually like for contractors — because the pain points mirror what we've seen with DIBBS and the now-retired FPDS.
Email notifications are noisy. eBuy sends emails when task orders matching your domains are posted. But the notifications don't tell you whether the opportunity is a good fit for your company, whether you have relevant past performance, or whether the competitive landscape favors you. Every notification looks the same — and when you're getting dozens per week, the signal-to-noise ratio drops fast.
No intelligent matching. eBuy shows you everything in your awarded domains and NAICS codes. It doesn't score opportunities against your capabilities. It doesn't surface the task orders where you have the strongest competitive position. It doesn't flag when a re-compete of an expiring task order is posted — one you might have tracked if you had competitive intelligence.
No connection to your capture workflow. eBuy is where you find and respond to solicitations. Your capture pipeline lives in a spreadsheet or CRM. Your past performance lives in a folder. Your proposal tools are in Word. Your competitive research is in yet another tab. You're the integration layer, constantly copying information between systems.
RFIs are easy to miss and hard to prioritize. RFIs posted on eBuy can shape upcoming procurements, but most contractors don't have a systematic process for monitoring and responding to them. If you're only watching for formal solicitations, you're entering the game after the rules are already set.
Amendments and cancellations require constant vigilance. Task order solicitations get amended, extended, and occasionally cancelled. eBuy sends notifications, but keeping track of which version of which solicitation is current — especially when you're pursuing multiple task orders simultaneously — requires discipline and systems that eBuy itself doesn't provide.
The core problem is familiar: eBuy is a government procurement tool designed for transactional efficiency. It was never designed to help contractors make strategic capture decisions. The contractors who treat eBuy as their entire workflow are doing the analysis themselves — in spreadsheets, with manual effort, at the cost of time and missed opportunities.
Getting on OASIS+: The Qualification Process
If you're not yet an OASIS+ contract holder, Phase II's continuous on-ramp is your path in. Here's what you need to know.
Eligibility Basics
OASIS+ uses a self-scoring, documentation-based evaluation. You score yourself against a qualifications matrix for each domain you're proposing, then submit documentation proving each claim. GSA reviews your submission and either awards or rejects based on whether you meet the threshold.
Unrestricted pool: Qualifying projects must have a minimum average annual value of $1,000,000. You need to meet or exceed a 42-credit scoring threshold.
Small business pools: Qualifying projects must have a minimum average annual value of $500,000. The scoring threshold is 36 credits.
The Five Scoring Categories
OASIS+ uses a self-scoring evaluation across five weighted categories. Each domain has its own scorecard with 50 total credits available. You calculate your own score, then GSA validates your documentation during review. Here's what each category covers:
Qualifying Projects (QPs) — Heaviest weight. These are your past contracts that demonstrate capability in the domains you're proposing. Each QP must align with at least one of your chosen service domains and meet the minimum average annual value ($1M for Unrestricted, $500K for Small Business). GSA evaluates QPs on scope relevance, contract value, and demonstrated integrated experience. Your strongest QPs should show complex, multi-discipline work — not straightforward staff augmentation. Some domains also award bonus credits for "Integrated Experience" where a single project spans multiple service areas.
Past Performance — Quality of delivery. This category scores the quality ratings on your qualifying projects. CPARS ratings carry the most weight, but you can also use agency-provided past performance questionnaires or other documented evaluations. Strong past performance ratings (Exceptional or Very Good in CPARS) earn more credits than Satisfactory ratings. If your QPs don't have CPARS records — common for state/local or commercial work — you'll need to provide alternative documentation that GSA can verify.
Federal Prime Experience (FPEs) — Proving you can manage government work directly. FPEs demonstrate that your company has managed federal contracts as a prime contractor, not just as a subcontractor. This is a critical differentiator. GSA wants evidence that you can handle the administrative, compliance, and reporting requirements of federal prime contracting. If your federal work has been primarily as a sub, this category will be a gap in your scorecard — and one worth addressing before you submit.
Contractor Business Systems — Operational maturity. This covers your accounting system, estimating system, and other business systems that demonstrate your ability to manage cost-reimbursement and T&M contracts. An adequate accounting system (validated by DCAA or equivalent) is particularly important because the majority of OASIS+ task orders use cost-type pricing. If your accounting system hasn't been audited, that's a pre-submission investment worth making.
Facility Clearances and Other Certifications — Differentiation credits. Government facility security clearances (Secret, Top Secret, SCI) add credits that many competitors can't match. Domain-specific certifications — ISO standards, CMMI levels, specialized professional licenses — also earn points here. These credits can be the difference between meeting and missing the scoring threshold, especially for firms whose QP portfolio is on the borderline.
Strategy tip: Before submitting, download the scorecard for each domain you're targeting from the OASIS+ Interact Community and score yourself honestly. If you're within a few credits of the threshold, identify which category offers the fastest path to additional points — often it's obtaining a certification or waiting for a current contract to generate a CPARS rating.
The Submission Process
All proposals are submitted through the OASIS+ Symphony Portal. There are no fixed deadlines — you submit when ready. GSA evaluates in the order received, subject to resource availability. Existing awardees can also compete for additional domains through contract modifications.
Practical advice: Don't rush your submission. The continuous on-ramp means you can wait until your qualifying projects are strongest, your CPARS ratings are current, and your documentation is airtight. A weak submission that gets rejected wastes time — and you'll need to resubmit with updated qualifications to try again. Use the draft scorecards GSA released through Interact to pre-score yourself before submitting.
Small Business Strategy on OASIS+
OASIS+ was designed with small business participation as a core objective. Five of the six contract pools are dedicated small business tracks, and GSA has made roughly 3,400 of its ~4,100 total awards to small businesses. That's not accidental — it reflects both the self-scoring thresholds (lower for small business) and the government's continued push to meet small business contracting goals.
Why OASIS+ Matters for Small Businesses
Access to complex work. Unlike GSA Schedules, which typically handle simpler procurements, OASIS+ supports all contract types including cost-reimbursement — the pricing model used on the majority of legacy OASIS obligations. This gives small businesses a path to the larger, more complex professional services work that was historically dominated by large integrators.
Set-aside task orders. Agencies can set aside specific task orders for any of the small business pools — 8(a), SDVOSB, WOSB, HUBZone, or Total Small Business — depending on whether the Rule of Two is met. Responding to RFIs is how you influence whether a requirement gets set aside.
Subcontracting pathway. Large Unrestricted OASIS+ contractors are required to meet subcontracting plan goals. If you're a small business that isn't yet on OASIS+, positioning yourself as a subcontractor to an Unrestricted prime is a legitimate entry strategy — it builds past performance and revenue while you prepare your own OASIS+ on-ramp submission.
Teaming is built into the vehicle. OASIS+ supports contractor teaming arrangements (CTAs) and joint ventures. Small businesses can team with other OASIS+ holders to pursue task orders that exceed their individual capacity — and GSA specifically encourages networking across pools and domains at Program Management Reviews (PMRs) and through the Interact Community.
Why eBuy Alone Isn't Enough
The pattern here mirrors what we documented in our guides to DIBBS and the FPDS retirement: government procurement systems are repositories, not strategy tools. Here's what eBuy doesn't give you:
| Capability | GSA eBuy | CLEATUS |
|---|---|---|
| Task order notifications | Email alerts by domain/NAICS | AI-matched to your company profile with fit scoring |
| Opportunity scoring | None | Automated fit and win probability assessment |
| Competitive intelligence | Contractor list visible; no analysis | Incumbent tracking, award history, competitive density |
| Solicitation analysis | Download and read manually | AI-powered breakdown into Sections A–M with cited answers |
| Amendment tracking | Email notifications | Automatic pipeline updates with change detection |
| Cross-source discovery | OASIS+ and GSA Schedule only | 40,000+ sources — federal, state, local, education |
| Proposal support | Portal for submission only | AI Proposal Suite with compliance matrices and past performance matching |
| Pipeline integration | Standalone system | Unified pipeline alongside SAM.gov, DIBBS, state/local, and forecasts |
How CLEATUS Integrates with GSA eBuy
CLEATUS connects directly to GSA eBuy and automatically imports task orders — including OASIS+ solicitations — into your CLEATUS pipeline. The integration eliminates the gap between opportunity notification and capture action.
What the Integration Does
Automatic opportunity import. When task orders matching your GSA contract profile are posted on eBuy, they flow into your CLEATUS pipeline automatically. New RFQs, RFPs, and RFIs appear alongside your SAM.gov opportunities, DIBBS solicitations, state and local opportunities, and procurement forecasts — all in one prioritized view.
Real-time amendment and cancellation tracking. CLEATUS continuously monitors your connected categories for amendments, extensions, and cancellations. When a task order solicitation changes, your pipeline updates automatically and your team gets alerted — no more discovering a changed deadline from a stale email you missed.
AI-powered matching and scoring. Unlike eBuy's domain-level notifications, CLEATUS scores each task order against your full company profile — past performance, certifications, geographic fit, contract size, and competitive landscape. You see not just what's posted, but what's worth pursuing.
Seamless workflow from discovery to proposal. When you decide to pursue an OASIS+ task order, CLEATUS's Contract Breakdown automatically structures the solicitation into Sections A–M. The GovCon Copilot lets you chat directly with the task order PWS and get answers with page-level citations. The AI Proposal Suite generates compliance matrices and Section L/M-aligned drafts grounded in the actual evaluation criteria and your past performance.
Setup Takes Minutes
Connecting your eBuy account to CLEATUS is a one-time setup: navigate to Company Profile → Integrations → GSA eBuy, connect your credentials, and select the categories you want to monitor. From that point forward, your eBuy opportunities flow into CLEATUS automatically. For the full walkthrough, see the step-by-step setup guide.
– John Garnish, Business Development Lead, D2 Government Solutions
What Contractors Are Experiencing
The efficiency gains from automating opportunity discovery and solicitation analysis compound across every pursuit:
D2 Government Solutions, an SDVOSB with 300+ employees, was spending 8 hours daily searching for opportunities across federal portals. With CLEATUS, they achieved 75% faster opportunity discovery and 3x more proposals with the same team — tripling their output without adding headcount.
Operation Hired replaced their fragmented workflow of generic AI tools and spreadsheets with CLEATUS and achieved 6x proposal throughput in 10 weeks. The GovCon Copilot became their first-read expert for every solicitation.
MST Maritime went from 3 proposals per month to 10+, with 3x faster proposal development and 75% faster opportunity discovery. Same lean team, fundamentally different platform.
Frequently Asked Questions
Stop Monitoring eBuy Manually. Start Winning Task Orders.
OASIS+ is the vehicle the government is consolidating professional services spending onto. GSA eBuy is the only door through which that work flows. The contractors who are winning aren't the ones checking their email and logging into eBuy every morning — they're the ones whose pipeline updates itself, whose solicitations analyze themselves, and whose proposals start from structured data rather than a blank page.
CLEATUS was built for exactly this workflow. Connect your eBuy account once, and OASIS+ task orders flow into the same AI-powered pipeline where you're already tracking SAM.gov opportunities, DIBBS solicitations, state and local contracts, and procurement forecasts. From there, the Contract Breakdown structures every task order PWS, the GovCon Copilot answers your questions with cited sources, and the AI Proposal Suite generates compliant drafts mapped to evaluation criteria.
Your competitors on OASIS+ are building this infrastructure right now. Every task order you miss because you didn't see the eBuy notification in time — or didn't have the bandwidth to analyze it before the deadline — is revenue you won't recover.
Start Your Free CLEATUS Trial and connect your GSA eBuy account in minutes.
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Further Reading
- Introducing the GSA eBuy Integration — Never Miss Another RFQ
- DIBBS Explained: How to Find and Win DLA Contracts
- FPDS Is Gone. Here's How Smart Contractors Are Accessing Government Contract Data Now.
- Stop Prompt Engineering. Start Winning Contracts.
- 10 AI Prompts to Decode Any Government Solicitation in 30 Minutes
Customer Stories
- How D2 Government Solutions Tripled Growth Without Adding Staff
- How Operation Hired Achieved 6× Proposal Output with CLEATUS AI
- How MST Maritime Quadrupled Proposal Output with CLEATUS AI
About CLEATUS
CLEATUS is an AI-powered government contracting platform that helps contractors find opportunities, analyze requirements, track competitors, and win more contracts — at a fraction of traditional capture costs. We aggregate federal, state, local, and city opportunities; our GovCon Copilot analyzes solicitations and your internal documents to deliver actionable market intelligence that drives revenue growth.