Since its release this past January, we’ve been tracking the latest updates on Phase II of OASIS+, GSA’s Best-in-Class government-wide contracting vehicle for professional services. OASIS+ Phase II follows closely on the heels of Phase I, which was open for submission from June to October of 2023 and finalized its last awards earlier this year. Phase II, meanwhile, has been continuously open for submission since January, with the first batch of awards issued in May.
With Phase II in the spotlight, you may be wondering how OASIS+ Phase II differs from OASIS+ Phase I (often referred to as just OASIS+). In this blog, we’ll clarify these differences for you, so that you’re up to speed on Phase II in time to start your OASIS+ proposal.
What is OASIS+?
Before we get into the differences between the two phases, let’s go over what OASIS+ actually is. OASIS+, or One Acquisition Solution for Integrated Services Plus, is an Indefinite Delivery, Indefinite Quantity (IDIQ) government-wide contracting vehicle for non-IT professional services. Contractors who apply and are accepted into the vehicle are then eligible to compete for professional services contracting opportunities with government agencies.
As a Best-in-Class vehicle, OASIS+ meets standards established by the Office of Management and Budget (OMB) for high-performing contracts. In that vein, OASIS+ allows government agencies to easily access high-quality professional services from vetted contractors, streamlining those agencies’ procurement processes.
OASIS+ is administered by the General Services Administration (GSA), which also manages the Multiple Award Schedule (MAS) contracting vehicle. A key difference from the MAS Program, however, is that OASIS+ is broken into 6 socioeconomic pools that contractors apply for: Small Business, 8(a), HUBZone, Service-Disabled Veteran-Owned, Women-Owned Small Business, and Unrestricted. These pools are essentially separate IDIQ contracts with their own solicitations on SAM.gov.
Now that we’ve covered what OASIS+ is, let’s discuss what’s new in Phase II compared to Phase I. The differences we’ll cover include the addition of domains, submission requirements, and timeframe.
New Domains in OASIS+ Phase II
The main difference in Phase II is the addition of several domains, which are professional services categories tied to specific North American Industry Classification System (NAICS) Codes. Agencies release OASIS+ contracting opportunities under the domain that best fits their requirement.
Phase 2 adds 5 domains to the OASIS+ program, meaning that there are 5 additional categories of professional services where contractors can seek government contracting opportunities. These new domains are listed below:
- Business Administration
- Financial Services
- Human Capital
- Marketing and Public Relations
- Social Services
These additions bring the total number of domains in the OASIS+ contracting vehicle to 13. The original 8 domains, still part of the program, are below:
- Technical & Engineering
- Research & Development
- Management & Advisory
- Environmental
- Intelligence Services
- Enterprise Solutions
- Facilities Services
- Logistics
Impact of the New OASIS+ Domains
What does the addition of these 5 domains mean for contractors and government buyers? For contractors, new domains mean increased opportunities for sectors that previously weren’t included in the contracting vehicle. For government buyers, new domains mean access to a broader range of highly qualified service providers.
It’s worth noting that these new domains weren’t chosen randomly – GSA used market research, spending analysis, and industry feedback from an RFI posted in June 2025 to identify critical service areas where government spending was previously unmanaged. Adding these domains to the OASIS+ program should streamline the procurement of those service areas.
While it may be tempting to apply for a lot of domains to maximize your contracting opportunities, keep in mind that contractors applying for a certain domain will need to demonstrate past performance relevant to that domain. We’ll touch on this more below.
Submission Requirements for OASIS+ Phase I vs. Phase II
Next, we’ll look at some key differences in submission requirements from Phase I to Phase II – that said, the submission requirements generally remain unchanged.
Addition of Scorecards for New Domains
The main difference is the addition of 5 scorecards for the 5 new domains.
For context on the scorecard, a large part of the OASIS+ proposal involves submitting past performance documentation for 5 of your company’s projects, which are scored based on the metrics in the OASIS+ scorecard. Contractors will need to self-score their projects before submitting, to make sure that they can meet the minimum score. We discuss scoring more in ourblog on OASIS+ projects.
The scorecard is different for each domain, because different domains value different project attributes. Since OASIS+ Phase II added 5 domains, there are 5 new scorecards – you can find these on the last 5 tabs of solicitation attachment “J.P-1.”
New Certification Added to Scorecard
This next change affects the scorecards for several of the original domains, specifically:
-
Technical & Engineering
- Management & Advisory
- Enterprise Solutions
- Logistics
- Intelligence Services
- Research & Development
In Phase II, these domains include another certification under scorecard Section L.5.5 - Other Certifications: Cybersecurity Maturity Model Certification (CMMC) - Level 2 or higher. This means that offerors with CMMC Level 2 or above can score a point in the Certifications category.
Proposal Document Updates
OASIS+ Phase II also adds a few minor documents to the proposal. The most important one to note is a J.P-13 Financial Data Input Template, which contractors should use to fill out their financial information from the last three years.
To ensure you’re using the latest OASIS+ templates in your proposal, make sure that you’re pulling them from the Phase II solicitation on SAM.gov. Indicators that you’re on the right OASIS+ solicitation are “Continuously Open” in the title and a green “Active” button. If the solicitation page is “Inactive,” you’re on Phase I, which has outdated documents.
Timeframe of OASIS+ Phase I vs. Phase II
As we touched on above, another key difference between Phase I and Phase II is the timeframe for submission. Phase I’s submission window opened in June 2023 and closed that October.
Phase II, meanwhile, has been continuously open for submission since January of this year. This means that GSA will receive submissions for all 6 OASIS+ solicitations (for the 6 socioeconomic pools) indefinitely. GSA will make a public announcement in advance of closing a specific domain or solicitation.
As far as the award timeframe, GSA finalized its last Phase I awards earlier this year and will issue Phase II awards on a rolling basis. GSA already released the first batch of OASIS+ Phase II awards in May, five months after Phase II opened for submission. However, there is no guaranteed timeline for Phase II awards, and we can’t assume that all awards will be processed that quickly, especially as the submissions stack up.
Keep in mind that OASIS+ does not cap the number of awardees, and contractors will not be evaluated against each other. So, if you’re only considering applying for OASIS+ now, don’t worry that you’ll be less competitive by starting your proposal later.
Diving Deeper Into OASIS+
While you should now be up to speed on what’s new in Phase II, we’ve only scratched the surface of the OASIS+ offer process overall. GSA’s OASIS+ site has more information on preparing an offer. In addition, GSA posts announcements on the OASIS+ solicitation and program through GSA Interact.
Winvale’s blog is also a great source for the latest updates on OASIS+. If you’re at the point of needing assistance with your OASIS+ proposal, our team is ready to help you craft your proposal from beginning to end.
