For a professional services firm, the most important contract vehicle in federal contracting is probably one you have never bid on: OASIS+, GSA’s government-wide vehicle for professional services. It is the successor to the original OASIS contracts, which moved billions of dollars of management consulting, engineering, research, and programme support work through task orders. OASIS+ is bigger, more flexible, and deliberately built around small business. This guide explains what OASIS+ is, how it is organised, who can hold a place on it, and how task orders work under it — so you can decide whether it belongs in your federal strategy.
It is written for a small professional services firm deciding which vehicles to pursue. If you are still weighing the GSA Schedule against other routes, start with our guide on how to get on GSA schedule and our guide to GSA MAS SIN categories, which cover the route most small firms take first.
What Is OASIS+?
OASIS+ is a family of multi-award, indefinite-delivery contracts run by GSA for professional services. It is a government-wide vehicle, which means any federal agency can order from it. GSA awarded the OASIS+ contracts in 2024, replacing the original OASIS and OASIS Small Business vehicles, and the ordering period runs for up to ten years. Like other multi-award vehicles, OASIS+ itself awards no work: agencies issue task order requests to the holders, the holders compete, and one wins each order.
The vehicle is organised into eight service domains, and a company holds a place in one or more domains. There are separate contracts for small businesses and for unrestricted competition, and the small business side is divided into tracks for different socioeconomic categories. That structure is the point of OASIS+: it gives agencies a single vehicle where they can buy professional services from small businesses, set aside orders for specific categories, or run a full and open competition — all without leaving the vehicle.
The Eight OASIS+ Domains
OASIS+ covers eight domains of professional services. A firm applies for the domains where its work fits, and can hold places in more than one:
- Management and Advisory — management consulting, programme management, business process improvement, and advisory services.
- Technical and Engineering — engineering services, systems engineering, and technical support.
- Research and Development — research, development, testing, and evaluation support.
- Intelligence Services — intelligence analysis and related support services.
- Environmental Services — environmental consulting, remediation support, and compliance services.
- Logistics Services — supply chain, transportation, and logistics support.
- Facilities Services — facilities management and related support services.
- Financial Services — financial management, auditing, and accounting support.
Most small firms fit clearly into one or two domains. A management consulting firm belongs in Management and Advisory. An engineering firm belongs in Technical and Engineering. Applying for domains where your past performance is weak only slows your proposal and dilutes your score, so choose the domains where your evidence is strongest and build from there.
Small Business Tracks and Set-Asides
OASIS+ was designed with small business at its centre. The small business contracts are divided into tracks, including a general small business track and tracks reserved for 8(a), HUBZone, woman-owned, and service-disabled veteran-owned firms. Agencies can set aside a task order for small businesses generally, or for a specific category, and only the holders in that track compete for it.
That matters because it changes the odds. On an unrestricted vehicle, a small firm competes against the largest contractors in the country. On an OASIS+ small business track, it competes against other small firms. If you hold a certification, the track system can be the difference between winning work and never getting a look. If you are eligible for a certification and have not yet applied, the OASIS+ structure is a strong reason to start — see our guides on 8(a) certification requirements and HUBZone certification requirements for where to begin.
How to Get on OASIS+
You get on OASIS+ the same way you get on any closed multi-award vehicle: through a solicitation and, later, through on-ramps. GSA ran the initial competition when the vehicle was awarded, and it adds new holders through on-ramp competitions that open periodically. An on-ramp is announced on SAM.gov, with a solicitation, a deadline, and instructions. The window is usually measured in weeks, not months, so the preparation has to happen before the announcement.
OASIS+ proposals are scored on the evidence you submit: relevant past performance, experience in the domains you are applying for, key personnel, and your socioeconomic status. The scoring is detailed and document-heavy, and the firms that win are the ones whose evidence is organised and verifiable — contract numbers, values, dates, and references for every project claimed. GWAC competitions work the same way: on-ramps open periodically, proposals are scored against a published table, and preparation has to happen before the announcement.
Before you apply, check your readiness honestly. Do you have two or three past performance references that match the domains you want? Do you have the staff to deliver the work? Do your certifications match the tracks you are targeting? If the answer to any of these is no, the on-ramp is not your target — the one after it is. Use the time to build the evidence on open-market work and through the GSA Schedule.
How Task Orders Work Under OASIS+
Once you hold a place on OASIS+, work comes through task orders. The agency issues a task order request to the holders in the relevant domain and track, the holders submit short proposals, and the agency evaluates and awards. The process follows the fair opportunity rules of FAR 16.505: every holder in the pool gets a fair opportunity to compete, with limited exceptions for urgency, follow-on work, or very small orders.
Task order proposals under OASIS+ are shorter than full contract proposals, but the evaluation factors are familiar: technical approach, key personnel, past performance, and price. A strong technical approach names the people who will do the work, describes the method, and points to similar work you have done. Our guides on how to write a technical approach and proposal executive summaries apply directly to these short proposals.
Price on a task order must be consistent with your contract’s pricing structure, and it will be compared against the other holders’ quotes. Know your costs, price to win without pricing below them, and remember that a task order won at a loss damages your past performance when delivery suffers. Our guide on how to price a government contract bid covers the costing discipline that applies here.
A small contract access fee applies to task order value under OASIS+, similar in concept to the Industrial Funding Fee on GSA Schedule sales. Factor it into your pricing when you quote, so it never comes as a surprise.
OASIS+ vs GSA Schedule: Which Fits Your Firm?
Many professional services firms hold both, and the two vehicles serve different purposes. The GSA Schedule is open continuously — you can apply whenever you are ready — and it is the faster route to your first federal revenue. OASIS+ is a closed vehicle with periodic on-ramps, and it takes longer to get onto, but its task orders are often larger, and its small business tracks give certified firms a protected pool to compete in.
The practical order for most firms is: schedule first, OASIS+ second. Use the schedule to build past performance, agency relationships, and revenue. Use that record to compete for an OASIS+ place when an on-ramp opens. Once you hold both, use each for what it does best: the schedule for repeatable services and quick orders, OASIS+ for larger professional services task orders where the domain and track system works in your favour.
There is one more consideration. OASIS+ is a GSA vehicle, and GSA manages it actively — issuing modifications, updating instructions, and running the on-ramps. Keep your SAM.gov registration current, read every modification, and watch SAM.gov for on-ramp announcements in your domains. The firms that win places are the ones that were watching before the window opened.
Common Mistakes to Avoid
The most common mistake is applying for too many domains. A proposal spread across five domains with thin evidence in each scores worse than a proposal focused on two domains with strong evidence. Pick your best domains and apply there.
The second mistake is treating the task order competition as an afterthought. Some firms celebrate winning a place on the vehicle and then never respond to task order requests. A place on OASIS+ with no task order wins is worth nothing. Watch for requests daily, choose the orders you can win, and write strong, specific proposals. Our bid/no-bid decision framework helps you choose.
The third mistake is neglecting delivery. Task order past performance under OASIS+ is recorded and evaluated, and it compounds: good delivery on your first orders makes the next ones easier to win. Deliver well, ask the agency for feedback, and keep your record clean. Our guide on government debriefs explains how to learn from every order, win or lose.
The Bottom Line
OASIS+ is the professional services vehicle that matters most for small federal contractors, and it will matter more as agencies shift work onto it over the coming years. Its eight domains cover the core of what professional services firms sell, its small business tracks protect certified firms from open competition with the largest contractors, and its task orders are large enough to build a business on. Getting on takes preparation and patience — you need the past performance, the certifications, and the readiness to move when an on-ramp opens. Start that preparation now, while the vehicle is still young, and you will be ready when the window opens.
2 Responses