OASIS+ just changed shape again.
With Phase II, GSA has locked in a major expansion of its next-generation professional services contract and aligned it directly with Executive Order 14240, “Eliminating Waste and Saving Taxpayer Dollars by Consolidating Procurement.”
For federal contractors, this isn’t a minor update. It’s a structural shift in how agencies will buy complex, non-IT services for the next decade—and how your firm positions itself across 13 continuously open OASIS+ domains.
Capitol 50 Consultants is looking at Phase II as both a stress test and a invitation: a test of how prepared contractors really are, and an invitation to re-think where and how you plan to compete.
Let’s walk through what changed, why it matters, and what Capitol 50 thinks you should be doing before January 2026 shows up on the task order calendar.
Quick recap: What is OASIS+ and why does Phase II matter?
OASIS+ (One Acquisition Solution for Integrated Services Plus) is GSA’s government-wide, multi-award IDIQ for complex non-IT professional services. It covers both large and small business tracks, including socio-economic set-aside contracts, with potential ordering periods of up to 10 years.
It already sits alongside the GSA MAS program and other GSA commercial platforms as one of the central ways agencies buy professional services. That means:
- Agencies use OASIS+ to consolidate large, multi-discipline professional services requirements under a single contract.
- Vendors treat it as a strategic growth vehicle, not just another IDIQ.
- The self-scoring, documentation-heavy evaluation model rewards mature past performance, proven systems, and disciplined proposal prep rather than clever narrative alone.
Phase II raises the stakes by tying OASIS+ directly to EO 14240’s push to centralize procurement of common goods and services under GSA and reduce duplication across agencies.
In plain language: if your firm wants to grow in federal professional services while this order is in effect, ignoring OASIS+ is risky.
The new OASIS+ landscape: 13 domains, including 5 brand-new lanes
Before Phase II, OASIS+ covered eight domains focused on core technical and advisory services. With Phase II, GSA confirmed the addition of five more service domains to all six OASIS+ solicitations, bringing the total to 13.
Existing OASIS+ domains
- Technical and Engineering
- Research and Development
- Management and Advisory
- Environmental
- Intelligence Services
- Enterprise Solutions
- Facilities Services
- Logistics
New Phase II domains
- Business Administration
- Financial Services
- Human Capital
- Marketing and Public Relations
- Social Services
These five additions aren’t filler. GSA’s market research, spend analysis, and Phase II RFI responses highlighted these areas as major slices of unmanaged federal spend—the kind of work that previously sat on disparate contracts, agency-unique vehicles, or scattered task orders.
So now you have 13 “lanes” where you can:
- Hold awards in multiple domains
- Expand into new capability areas as your past performance grows
- Use OASIS+ as a central platform for recurring professional services work
For some firms especially those in HR consulting, financial management, social services, or communications, Phase II is the first time their core work has a natural home in OASIS+.
Continuous open solicitations: January 2026 changes the rhythm
Here’s the timing that matters:
- December 16, 2025 (target): GSA plans to post a pre-amendment notice on SAM.gov with DRAFT scorecards for all 13 domains.
- On or about January 12, 2026: All six OASIS+ solicitations—Unrestricted plus five small-business set-aside tracks—are expected to reopen and become continuously open for proposal submissions.
Once that switch flips, the structure changes:
- No more “wait years for the next on-ramp.”
- Firms can submit proposals when they are ready and self-score strongly enough.
- Agencies gain a constantly refreshed pool of contractors across all domains.
Capitol 50’s reading of this: OASIS+ starts to look more like a standing marketplace of qualified professional services vendors than a traditional, periodic-competition vehicle. That lines up neatly with the government’s broader shift to procurement consolidation under GSA’s stewardship.
How EO 14240 ties into OASIS+ Phase II
Executive Order 14240 tells agencies to centralize procurement of common goods and services through GSA and cut duplicative contracts and fragmented buying.
GSA’s own procurement consolidation guidance explains that this includes:
- Increased use of centralized contract vehicles managed by GSA
- Stronger category management across government
- Fewer overlapping contracts for the same services
- Phase II of OASIS+ sits right in that current:
- 13 domains covering the majority of non-IT professional services
- Multiple set-aside tracks to keep socio-economic participation strong
- A single, government-wide solution instead of dozens of agency-unique professional services vehicles
For contractors, especially those asking “what is a GSA contract, and how does OASIS+ compare to GSA MAS?”, the answer now is blunt:
- GSA MAS still dominates for catalog-type services, commercial products, and defined labor categorizations, organized by GSA SIN numbers (GSA SINs).
- OASIS+ is positioned as the primary home for complex, integrated professional services requirements that don’t fit neatly on MAS and that benefit from broader, domain-based competition.
Capitol 50 increasingly sees agencies asking:
“Is this requirement better on MAS, a GSA commercial platform, or OASIS+?”
That question will only show up more often after Phase II.
What contractors should do now (before draft scorecards drop)
Once GSA posts the DRAFT scorecards for all domains on SAM.gov in mid-December, the clock will feel very real. But waiting until then to react is a mistake.
Capitol 50 suggests four moves right now:
1. Decide your domain strategy across all 13 lanes
Not every firm should chase every lane. In fact, chasing too many can wreck your self-score.
Questions to answer:
- Which core domains do we truly compete in today, based on revenue, past performance, and staff credentials?
- Where can we credibly meet or exceed expected self-score thresholds?
- Which Phase II domains (Business Administration, Financial Services, Human Capital, Marketing & PR, Social Services) line up with what we already deliver?
If you’re unsure, Capitol 50 often starts with a contract qualification review, mapping real task orders and revenues to OASIS+ domains and NAICS codes. That prevents wishful thinking from driving your bid/no-bid choices.
👉 Consider: Contract Qualification Review with Capitol 50
2. Build (or fix) your self-scoring and evidence library
OASIS+ uses a structured self-scoring model that rewards documented past performance, systems, certifications, and key personnel.
Most firms underestimate the work in three places:
- Evidence collection – SOWs, CPARS, task order mods, subcontract agreements, resumes, certifications.
- Traceability – Matching each point claimed to clear documentation.
- Version control – Keeping the “official” evidence set aligned with evolving scorecards and RFQ language.
This is exactly where a GSA contract consultant like Capitol 50 spends a lot of time—turning a messy file share into a predictable proposal engine, not just for OASIS+ but also for GSA contract vehicles more broadly.
👉 Need help getting your house in order? See Capitol 50’s Contract Administration Services.
3. Align your vehicle strategy: OASIS+ vs MAS vs other vehicles
If you’re already asking how to obtain a GSA contract or whether you should pursue MAS first, OASIS+ adds another dimension.
Capitol 50 often sees three patterns:
- MAS first, then OASIS+
- Firms with commercial-type offerings and clearly mapped GSA SIN numbers start on MAS, build past performance, then aim at OASIS+.
- OASIS+ as the flagship
- Mid-size and larger firms with strong project-based performance, especially in management consulting, engineering, or social services, see OASIS+ as the main platform and treat MAS as supporting infrastructure.
- Mixed portfolio
- Firms with both catalog-like services and complex project capabilities hold both MAS and OASIS+ positions and route opportunities accordingly.
The right move isn’t universal—but reacting randomly is a good way to stretch staff thin and miss real opportunities.
👉 Capitol 50’s Government Contracting Vehicles page walks through how MAS, OASIS+, and other GWACs can fit together in a single growth plan.
4. Prepare for modifications, novations, and EO-driven scrutiny
Existing OASIS+ awardees will eventually face contract modifications tied to Phase II and the new domains. GSA already emphasizes the need to handle modifications carefully across its portfolio.
Layer in:
- GSA modification guidance for MAS and other contracts
- Potential novation scenarios under the FAR when M&A activity shifts who actually holds the vehicle
- Increasing attention to pricing relative to most favored customer GSA expectations
And you have a situation where hastily executed changes can create long-term compliance and pricing headaches.
Capitol 50 frequently works with clients on:
- Interpreting novation FAR requirements when reorganizations or acquisitions hit GSA vehicles
- Planning modification sequences so OASIS+, MAS, and other contracts stay aligned instead of drifting apart
- Keeping an eye on pricing positions and discounting logic as agencies compare MAS, OASIS+, and other options
👉 If Phase II collides with a corporate change, talk to Capitol 50 early via GSA Contract Assistance or Request a Free Audit.
The bigger picture: OASIS+ in a consolidation era
Taken together, EO 14240, OMB’s implementation guidance, and OASIS+ Phase II all point in the same direction:
- Fewer, bigger, national contract platforms managed by GSA
- A preference for vehicles that fold multiple professional service types into structured domains
- Increased use of centralized contract vehicles as the default answer for common needs.
So where does that leave contractors?
- If you’re already on OASIS+, Phase II is your chance to expand into new domains and adjust your position before continuous open competition settles into its long-term rhythm.
- If you missed the initial wave, January 2026 is not the finish line—it’s your entry point, but only if your scorecard and evidence library support a serious bid.
- If you’re still on the outside of GSA entirely, this is the moment to decide whether your first step is MAS, OASIS+, or another government-wide vehicle.
Capitol 50’s view is simple: OASIS+ Phase II is not just another acquisition event. It’s part of the blueprint for how federal professional services will be bought under GSA for years.
If your growth plan doesn’t explicitly answer:
“What is our strategy across the 13 OASIS+ domains—and how does that connect to our MAS and other GSA contracts?”
…then there’s work to do.
How Capitol 50 can support your OASIS+ Phase II strategy
Capitol 50 Consultants supports vendors across the GSA landscape, including:
- Pre-award and post-award GSA contract assistance for MAS and OASIS+
- Industry market analysis to validate which domains and NAICS codes align with real federal spend
- Vehicle portfolio planning across GSA MAS, OASIS+, and other government-wide vehicles
- Contract administration services for modifications, pricing updates, and compliance over the life of the contract
If you want to turn OASIS+ Phase II from a news headline into a concrete plan, start here:
- Request a Free Audit – figure out where you truly stand today.
- Industry Market Analysis – match your offerings to federal demand across the 13 domains.
- GSA Contract Assistance – tie your MAS, OASIS+, and other vehicles into one strategy.
OASIS+ is opening the door. Capitol 50 is here to help you step through on purpose, not by accident.
