On December 4, 2025, GSA announced the next step for its flagship professional services vehicle: the OASIS+ Phase II Opening. All six OASIS+ solicitations will move to a continuously open model, with proposal submissions planned to re-open on or about January 12, 2026.

For federal contractors across the 13 OASIS+ domains—especially firms that missed Phase I, have improved their qualifications, or now fit the newly added domains—this is the signal to start preparing. You cannot submit a proposal yet, but you absolutely can (and should) begin organizing documentation, planning teaming, and building a defensible self-score long before the doors officially open.

Because OASIS+ uses a documentation-heavy, self-scoring evaluation model rather than narrative proposal “spin,” firms that treat the OASIS+ Phase II Opening as a preparation window—not just an RFP date—will have a decisive advantage.

Why the OASIS+ Phase II Opening matters

OASIS+ is GSA’s governmentwide, multi-agency, multiple-award IDIQ program for complex non-IT professional services, designated as a Best-in-Class contract. It provides up to a 10-year ordering period (5-year base plus 5-year option) across six separate contracts: Total Small Business, HUBZone small business, WOSB, 8(a), SDVOSB, and Unrestricted.

Three aspects make the OASIS+ Phase II Opening especially important:

  1. Thirteen domains, including five new ones
    OASIS+ organizes its scope into domains—functional groupings of related non-IT services with aligned NAICS codes. Phase II adds five domains to the original eight: Business Administration, Financial Services, Human Capital, Marketing & Public Relations, and Social Services. This brings more natural homes for firms whose work didn’t fit cleanly in Phase I.

  2. Continuous open solicitations starting in January 2026
    GSA’s December 4 announcement confirms that all OASIS+ solicitations will be opened for continuous proposal submissions on or about January 12, 2026, moving away from one-time, fixed windows. That means future on-ramping becomes an ongoing process, not a once-per-decade event.

  3. Transparent, self-scoring evaluation model
    OASIS+ relies on a qualifications matrix and formal scorecards, with GSA explicitly directing vendors to self-score against those criteria before submitting offers. Points come from qualifying projects, federal experience, systems, certifications, and other corporate qualifications—each of which must be backed by solid evidence.

If you want long-term access to professional services work under GSA’s Best-in-Class framework, the OASIS+ Phase II Opening is your next major opportunity.

What changes with the OASIS+ Phase II Opening

The Phase II RFPs are not completely new solicitations; they are enhancements and expansions of the existing OASIS+ construct.

1. Expanded domain coverage and clearer fit

With 13 domains, OASIS+ now better reflects how agencies buy professional services:

  • Traditional technical, engineering, management, R&D, logistics, environmental, enterprise solutions, and facilities work remain covered under the original domains.

  • Firms in finance, HR and workforce services, outreach and communications, and social or community services now have specific domains aligned to their core competencies.

This lets you target the domains that match your real portfolio instead of forcing projects into ill-fitting categories.

2. Long-term, consolidated access to professional services demand

Legacy OASIS and OASIS Small Business ordering periods are ending, and agencies are increasingly being guided toward OASIS+ and other Best-in-Class vehicles for complex professional services needs. As procurement consolidation accelerates, a growing share of spend will naturally flow through OASIS+ rather than one-off agency IDIQs.

If you are not on OASIS+ as it matures under Phase II, you will be competing for a shrinking slice of work outside the vehicle.

3. Evidence-driven self-scoring instead of subjective narratives

The OASIS+ evaluation strategy is built around an objective qualifications matrix: a points-based system reflecting project size, complexity, domain relevance, federal experience, systems, certifications, and other corporate factors. GSA and industry guidance stress that self-scoring correctly—and backing every point with documentation—is what wins, not marketing narratives.

This also means self-scoring is not a trivial spreadsheet exercise; it is a structured way of quantifying your true competitive position.

How to prepare for the OASIS+ Phase II Opening

You cannot submit a proposal yet, but you can and should be laying groundwork now. Here’s how to use the run-up to the OASIS+ Phase II Opening intelligently.

1. Map your work to the 13 domains and NAICS

Start by mapping your portfolio to OASIS+ domains and associated NAICS codes so you know where you genuinely fit.

  • Identify which domains match your core capabilities today, including the five new Phase II domains.

  • Separate stretch domains (where you have limited or borderline experience) from strong domains.

  • Align this with size status and socio-economic designations to decide which of the six contracts (small business, HUBZone, WOSB, 8(a), SDVOSB, unrestricted) you should pursue.

This mapping will guide which internal stakeholders and partners you need at the table.

2. Perform a preliminary self-score

Using Phase I materials, GSA FAQs, and established industry interpretations, you can run a first-pass self-score to understand your starting point, even before Phase II scorecards are reissued.

Focus on:

  • Candidate qualifying projects (dollar value, complexity, domain alignment)

  • Federal vs. non-federal experience

  • Existing systems (e.g., accounting, EVMS, purchasing) and rate approvals

  • Certifications and clearances that are likely to carry points

You will refine this once updated scorecards are released, but an early estimate highlights gaps when there is still time to fix them or find partners.

3. Build an evidence library for self-scoring

Every point you claim under OASIS+ must be backed by verifiable documentation. GSA’s OASIS+ buyers’ and sellers’ guidance recommends self-scoring against the qualifications matrix before submission to ensure you meet or exceed domain thresholds.

Start curating:

  • Signed contracts, modifications, and task orders

  • Invoices or other funding records to substantiate project size

  • CPARS and other past performance reports

  • System approval letters, indirect rate agreements, and audit results

  • ISO/CMMI certificates and security clearance documentation

Treat the OASIS+ Phase II Opening as the deadline by which this library must be complete and easily navigable.

4. Shape your teaming and JV strategy around scoring gaps

Because OASIS+ allows Joint Ventures and teaming structures, many firms will need partners to reach domain thresholds or to compete credibly in more than one domain.

Use your preliminary self-score to answer:

  • Where do you already pass thresholds on your own?

  • Where are you short on points and need a partner’s projects, systems, or certifications?

  • Where should you lead as prime vs. join as a strategic team member?

These are not last-minute decisions; you will need time to negotiate roles, workshare, and internal approvals before locking them into your offer.

5. Use structured eligibility assessment to de-risk your decision

For many firms—especially those new to self-scoring, OASIS-type solicitations, or federal contracting—the hardest step is deciding whether you are truly competitive in a given domain before you spend heavily on full proposal development.

GDI Consulting’s OASIS+ Eligibility Assessment Service is designed precisely for this moment. You select the domain or domains, complete a focused questionnaire, and then a dedicated proposal manager reviews your information, calculates a probable self-score, and delivers a written report with recommendations on how to improve your position, whether to proceed as prime, seek teaming, or delay bidding.

For firms that decide to move forward, GDI’s OASIS+ Phase II Support Services provide an end-to-end, phase-based framework for proposal support. The model covers four phases: Phase 1 – Assessment & Optimization (contracts assessment, score optimization, qualification and teaming analysis, and refined go/no-go), Phase 2 – Proposal Preparation (all seven OASIS+ volumes), Phase 3 – Compliance Reviews & Symphony Submission (two rounds of compliance checks and upload), and Phase 4 – Post-Submission Support (clarifications and task-order playbook).

This kind of structured pre-assessment and phased support is not a box-checking exercise. The OASIS+ scoring system is complex, with nuanced rules about qualifying projects, federal experience, and documentation. Interpreting those rules correctly—and conservatively—requires deep experience in GSA self-scoring vehicles. Using expert eligibility assessment together with a four-phase support framework helps you avoid overestimating your score, underestimating your risks, or walking away from a domain where you could actually be competitive.

6. Educate your internal team on self-scoring and evidence

Internally, most capture, BD, and operations teams are used to narrative proposals, not point-based evaluations. Take time before the OASIS+ Phase II Opening to:

  • Share official OASIS+ overview and buyer/seller materials within your team.

  • Have your proposal or contracts team walk through at least one test self-score end-to-end.

  • Review internal and external resources on OASIS+ self-scoring and documentation so everyone understands what really drives awards under this model.

The goal is to align everyone around one reality: OASIS+ is won on verified points, not storytelling.

Where to watch for OASIS+ Phase II updates

As the OASIS+ Phase II Opening approaches, keep an eye on:

  • GSA’s December 4, 2025 news release for updates on timing and policy context

  • The main OASIS+ program pages and contracts information for updates to domains, tracks, and scope

  • The OASIS+ Interact community for industry communications, FAQs, and training announcements

These official channels will carry the definitive scorecards, updates, and instructions you must follow.

As the OASIS+ Phase II Opening approaches

GSA is clearly positioning OASIS+ as the central, consolidated home for complex federal professional services. With 13 domains, six contract tracks, continuously open solicitations, and a rigorous self-scoring evaluation model, the OASIS+ Phase II Opening is a pivotal moment to secure your place on this vehicle—or expand your footprint across new domains.

Preparing for this is not trivial work. It demands:

  • Sophisticated self-scoring that correctly interprets GSA’s qualifications matrix

  • A disciplined evidence library that can withstand audit-level scrutiny

  • Smart teaming and JV strategies tightly aligned to scoring gaps

For most firms, especially those newer to GSA vehicles or self-scoring solicitations, consulting with experienced federal proposal specialists who focus on OASIS+, self-scoring, and GSA contracting is the safest way to navigate this complexity. Services such as GDI Consulting’s OASIS+ Eligibility Assessment Service and OASIS+ Phase II Support Services help you make a clear, data-backed go/no-go decision, move through all four phases of proposal development and submission, and ensure that the offer you submit is both competitive on points and fully substantiated.

If your firm touches any of the 13 domains—particularly the new Business Administration, Financial Services, Human Capital, Marketing & Public Relations, or Social Services domains—this is the time to get expert help, finalize your strategy, and have your documentation ready so that when the solicitations re-open in January 2026, you are prepared to move quickly and confidently.