GSA's flagship professional services vehicle — structure, eligibility, and what holding a seat actually means.
Last reviewed on May 12, 2026.
OASIS+ is the General Services Administration's multiple-award contract vehicle for professional services. It is the successor to the original OASIS and OASIS Small Business contracts. Like its predecessor, OASIS+ is structured as a family of indefinite delivery, indefinite quantity (IDIQ) contracts that federal agencies use to compete and award task orders for professional services work. Ordering agencies pay a small fee to GSA on each task order.
OASIS+ is among the largest federal professional services vehicles, with billions of dollars in projected task order volume across the contract's life. For firms that perform professional services work, holding an OASIS+ contract is a significant business development asset; for firms that do not hold one, partnering with a holder is often the path to OASIS+ task orders.
OASIS+ is divided into separate pools based on the contracting status of the holder. The pools share the same scope but have different eligibility, separate competition, and separate price evaluation:
A firm can hold contracts in multiple pools if it meets the eligibility for each. Holding an unrestricted contract and a small business pool contract simultaneously is common for firms growing through the size threshold.
OASIS+ scope covers a broad range of professional services organized into domains. The exact domains and definitions are set by GSA; broadly, they include:
The labor category structure under OASIS+ is broad enough to accommodate most professional services work. Firms qualify under one or more domains in their proposal.
Task order procedures under FAR 16.505 are faster than full open competitions. Most task order competitions close in weeks rather than months.
OASIS+ is harder to obtain than a GSA Schedule but offers narrower direct competition (only contract holders in your pool can bid task orders). Typical proposal requirements during the original solicitation:
GSA periodically opens on-ramp opportunities to add new contract holders to specific pools. On-ramps are competitive and use criteria similar to the original solicitation. Off-ramps remove non-performing contractors. Firms not on the initial award list watch on-ramp announcements closely.
OASIS+ task orders use a mix of contract types — firm-fixed-price, time-and-materials, labor-hour, cost-reimbursement, and hybrids. The master contract establishes ceiling rates per labor category at the contract level; task orders price within or below those ceilings based on the specific scope.
Pricing competitiveness on OASIS+ task orders depends heavily on the firm's indirect rate structure. Firms with lean indirects can underbid competitors at the same fully burdened rate, leaving more profit margin; firms with heavy overhead struggle to match. See DCAA compliance and accounting systems for the underlying discipline.
| Vehicle | Best for | Distinct features |
|---|---|---|
| OASIS+ | Complex professional services, multi-domain task orders | Pool-based competition, broad scope, strong agency adoption |
| GSA Schedule (MAS) | Commercial professional services, broad agency reach | Open to many holders; lower competitive intensity per task order is rare |
| CIO-SP4 | IT services with health-IT emphasis | NIH-administered; multiple task areas including emerging tech |
| Agency-specific BPAs | Single-agency mission support | Single buyer; strong incumbent dynamics |