What Is the Period of Performance for OASIS+? The Complete Guide to the Government Largest Services IDIQ
OASIS+ has a 5-year base period plus one 5-year option -- 10 years total through 2034. Here is every detail: domains, pools, ceiling, ordering periods, task order limits, and how to win work on it.
The Short Answer
OASIS+ base period of performance: 5 years (June 2024 -- June 2029)
Option period: One 5-year option (June 2029 -- June 2034)
Maximum total period: 10 years through 2034
Task order period: Individual task orders can extend up to 5 years beyond the contract's ordering period, meaning task orders placed near the end of the option period could run as late as 2039.
What Is OASIS+?
OASIS+ (One Acquisition Solution for Integrated Services Plus) is a government-wide, multi-award, indefinite-delivery/indefinite-quantity (MA-IDIQ) contract vehicle managed by the General Services Administration (GSA). It is the successor to the original OASIS contracts awarded in 2014.
In plain English: OASIS+ is a pre-competed pool of qualified service providers. Any federal agency can use OASIS+ to buy complex professional services without running their own full-and-open competition from scratch.
Why OASIS+ Matters
| Metric | Value |
|---|---|
| Estimated ceiling | Unlimited (no aggregate ceiling) |
| Original OASIS spend (2014-2024) | ~$80 billion |
| Projected OASIS+ spend (2024-2034) | $100+ billion |
| Number of contract holders | ~3,700 across all pools |
| Agencies using OASIS | 70+ federal agencies |
| Task order sizes | $100K to $1B+ |
OASIS+ is the largest professional services contract vehicle in the federal government. It replaced the original OASIS and OASIS Small Business contracts, which together processed over $80 billion in task orders during their 10-year run.
OASIS+ Period of Performance -- Detailed Breakdown
Contract-Level Timeline
| Milestone | Date |
|---|---|
| Solicitation released | August 2023 |
| Proposals due | Multiple deadlines by domain (Oct-Dec 2023) |
| Awards began | January 2024 (rolling through mid-2024) |
| Base period start | June 30, 2024 |
| Base period end | June 29, 2029 |
| Option period start | June 30, 2029 (if exercised by GSA) |
| Option period end | June 29, 2034 |
| Last possible task order issuance | June 29, 2034 |
| Last possible task order completion | Up to June 29, 2039 |
Task Order-Level Timelines
Individual task orders placed under OASIS+ have their own periods of performance, subject to these rules:
Example: A task order issued on June 1, 2034 (near the end of the option period) could have a performance period extending to June 1, 2039.
Comparison to Original OASIS
| Feature | Original OASIS (2014) | OASIS+ (2024) |
|---|---|---|
| Base period | 5 years | 5 years |
| Option periods | One 5-year option | One 5-year option |
| Maximum duration | 10 years (2014-2024) | 10 years (2024-2034) |
| Task order extension | 5 years beyond ordering | 5 years beyond ordering |
| Latest task order completion | ~2029 | ~2039 |
OASIS+ Structure: Domains and Pools
OASIS+ is organized into service domains (broad categories of work) and pools (competition groups based on business size and socioeconomic status).
The 8 Service Domains
| Domain | Description | Key NAICS Codes |
|---|---|---|
| Management & Advisory | Consulting, program management, strategic planning | 541611, 541612, 541618 |
| Technical & Engineering | Engineering services, R&D, scientific consulting | 541330, 541715, 541720 |
| Scientific | Research, lab services, environmental science | 541380, 541620, 541690 |
| Intelligence Services | Analysis, collection management, counterintelligence | 541990 |
| Enterprise Solutions | IT consulting, digital transformation, systems integration | 541512, 541513, 541519 |
| Environmental | Remediation, compliance, environmental management | 562910, 562211, 541620 |
| Facilities | Facility management, O&M, logistics support | 561210, 561720, 488190 |
| Logistics | Supply chain, warehousing, transportation management | 541614, 493110, 488510 |
The Pools (Competition Groups)
Each domain has multiple pools based on business size:
| Pool | Description | Approximate Holders per Domain |
|---|---|---|
| Unrestricted | Open to all businesses | 300-800 |
| Small Business (SB) | Total small business set-aside | 200-500 |
| 8(a) | 8(a) certified businesses | 50-150 |
| HUBZone | HUBZone certified | 30-80 |
| SDVOSB | Service-Disabled Veteran-Owned | 50-150 |
| WOSB | Women-Owned Small Business | 50-120 |
Total contract holders across all domains and pools: ~3,700 companies
How Task Orders Work on OASIS+
The Ordering Process
Task Order Evaluation Methods
Agencies can use any of these approaches:
Task Order Size Distribution (Based on Original OASIS Data)
| Size Range | % of Task Orders | % of Dollars |
|---|---|---|
| Under $500K | 45% | 3% |
| $500K - $5M | 30% | 12% |
| $5M - $50M | 18% | 35% |
| $50M - $500M | 6% | 38% |
| Over $500M | 1% | 12% |
The bulk of the dollars flow through mid-to-large task orders ($5M-$500M), but the majority of individual opportunities are in the under-$5M range -- accessible to small and mid-size firms.
Top Agencies Using OASIS+
Based on original OASIS ordering patterns (expected to continue on OASIS+):
| Agency | Est. Annual OASIS Spend | Primary Domains |
|---|---|---|
| Department of Defense | ~$3.5 billion | Technical & Engineering, Intelligence, Logistics |
| Department of Homeland Security | ~$1.8 billion | Management & Advisory, Enterprise Solutions |
| Department of Health & Human Services | ~$1.2 billion | Management & Advisory, Scientific |
| Department of Veterans Affairs | ~$900 million | Enterprise Solutions, Facilities |
| Department of Energy | ~$800 million | Technical & Engineering, Environmental |
| NASA | ~$700 million | Scientific, Technical & Engineering |
| Department of Justice | ~$600 million | Management & Advisory, Intelligence |
| All others | ~$2.5 billion | Various |
How to Win Task Orders on OASIS+
If You Are Already an OASIS+ Holder
If You Are Not an OASIS+ Holder
On-ramp opportunities: GSA has indicated they will conduct periodic on-ramps to allow new companies to join OASIS+. These are expected every 1-2 years, but timing is at GSA's discretion.
Subcontracting: Many OASIS+ prime contractors need subcontractors. If you have specialized skills, teaming with an OASIS+ holder is the fastest path to OASIS+ revenue.
Alternative vehicles: If OASIS+ is not accessible, consider:
Key Win Factors
OASIS+ vs. Other Major Contract Vehicles
| Feature | OASIS+ | GSA Schedule | Alliant 2 | STARS III |
|---|---|---|---|---|
| Scope | Professional services (all) | Products + services | IT only | IT only (SB) |
| Ceiling | Unlimited | Unlimited | $50B | $22B |
| Holders | ~3,700 | ~30,000 | 61 | 505 |
| PoP | 10 years (2024-2034) | 20 years max | 10 years | 10 years |
| Task order max | No limit | $250K simplified | No limit | No limit |
| Set-aside pools | Yes (5 pools) | No (but orders can be set aside) | No (separate SB vehicle) | All small business |
| Ordering agencies | All federal | All federal | All federal | All federal |
The Bottom Line
OASIS+ is a 10-year, unlimited-ceiling vehicle that will process an estimated $100+ billion in professional services task orders through 2034 (with task order performance extending to 2039).
If your company provides professional services to the federal government -- consulting, engineering, IT, scientific research, facilities, logistics, environmental, or intelligence services -- OASIS+ is where the largest, most complex task orders live.
The data on who wins OASIS+ task orders, at what prices, in which domains, and from which agencies is available in the federal procurement record. Use it to find your competitive position.
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