Phone: (202) 296-5505 Email:

New Call-to-action

 Back to all posts

What You Need to Know About GSA’s Services MAC, an OASIS Replacement Blog Feature
Stephanie Hagan

By: Stephanie Hagan on February 14th, 2022

Print/Save as PDF

What You Need to Know About GSA’s Services MAC, an OASIS Replacement

Government Business Development | Contracts | 4 Min Read

Another contract vehicle is on the horizon for government contractors—GSA is creating a new services Indefinite Delivery, Indefinite Quantity (IDIQ) to replace OASIS. Named Services Multi-Agency Contract (MAC) this contract vehicle will support GSA’s Federal Acquisition (FAS) Office of Professional Services and Human Capital Categories (PSHC). Here’s what we know about the contract vehicle so far, including the reasoning behind its creation, its scope, and anticipated release dates.

What is GSA’s Services MAC?

Services MAC, or Services Multi-Agency Contract, is set to replace GSA’s One Acquisition Solution for Integrated Services (OASIS) contract vehicle. Although it's not meant to replace OASIS exactly, it's expected to have the same functions as OASIS and more. This new contract vehicle will be an Indefinite Delivery, Indefinite Quantity (IDIQ) meaning it will provide an indefinite quantity of services for a fixed time.

Services MAC was introduced by the GSA Office of Professional Services and Human Capital (PSHC). Similar to OASIS, the primary purpose of the Services MAC is to give government agencies easy and efficient access to innovative services from highly qualified businesses. However, Services MAC is set to be broader and more flexible which we’ll cover below.

Why is GSA Creating a New Contract Vehicle?

While OASIS is considered a success, it’s set to sunset in 2024, and GSA wants to make sure there is a contract vehicle to take its place. Services MAC will build on the strengths of OASIS, however, GSA aims to make Services MAC a flexible, dynamic contract vehicle that addresses federal agencies’ needs better.

Services MAC is intended to support complex services while also eliminating duplicate contracts. Duplicate contracts can drive acquisition costs up and in turn negatively affect small business contractors, so this new vehicle is expected to be beneficial for small businesses and improve government management on spend, contract, and subcontract performance.

Based on recent market research and historical spend, the demand for complex services in specific categories (which we’ll cover below) will increase, and GSA wants a contract vehicle to meet these needs. Services MAC is also designed to complement the Multiple Award Schedule (MAS) streamlined and effective practices but will not duplicate MAS.

What Do We Know About GSA’s Services MAC So Far?

Although the draft RFP has not yet been released, we know a fair amount about the Services MAC from Requests for Information (RFIs) and Industry Days held about this vehicle. Services MAC is intended to create a more efficient buying experience that will allow all contract pricing types, as well as non-commercial services or a mix of commercial and non-commercial services. GSA is considering having a longer period of performance for this new IDIQ as opposed to the typical 10 years.

Based on feedback from industry and agency customers, the new contract vehicle will likely be one contract, as opposed to a small business and unrestricted contract like OASIS. This means there will be no pools, but Domains instead.

Domains refer to the functional groupings of related services spanning multiple North American Industry Classification (NAICS) Codes. GSA will add new Domains based off data information assessments and needs, but the currently identified Domains are listed below.

Scope of the Services MAC

The contract vehicle’s scope is organized by Domains which make it easier for government agencies, because when they are ready to issue a task order solicitation, they will select the Domain that meets their needs and the corresponding NAICS Code. The chosen NAICS will then determine the size standard.

Multiple Domains will be assigned to this contract vehicle and each Domain is limited to the NAICS Codes specifically outlined. Here are the Domains so far:

  • Management and Advisory
  • Technical and Engineering
  • Research and Development
  • Intelligence Services
  • Enterprise Solutions
  • Environmental Services
  • Facilities
  • Logistics

Detailed information about each Domain and the corresponding NAICS Codes can be found in Section C Description/Specifications/Statement of Work.

When Will the Request for Proposal (RFP) Come Out?

The first two Requests for Information (RFIs) for Services MAC came out in mid-2021, and the draft RFP is anticipated in Q2 or Q3 of Fiscal Year 2022. The final RFP is anticipated in the fall of 2022, either at the end of Q4, or the beginning of Fiscal Year 2023, which starts in October. The release of the final RFP will be dependent on feedback from the draft RFP, so you’ll have an opportunity to submit responses soon if this contract vehicle interests you.

Keeping an Eye On Future Contracting Opportunities

We know it can be simultaneously exciting and overwhelming to sift through and monitor all the contracting opportunities available to you as a GSA contractor, especially new contract vehicles. While there is no set timeline for GSA’s Services MAC, we are keeping a close eye on the future draft RFP, and you can follow along for more information on our blog and our monthly newsletter.

In the meantime, you can focus on making sure your GSA contract is updated, and you are implementing good marketing practices. If you want to search for active opportunities, check out our blog on “How to Find Government Contract Opportunities on” Make sure your GSA Schedule is managed properly from sales reporting to modifications, in our blog, “How to Maintain Your GSA Schedule Contract: An Essential Checklist.”

Of course, our consultants are here to help if you want to pursue Services MAC or other contract vehicles, or if you need help managing your GSA Schedule.

New call-to-action


About Stephanie Hagan

Stephanie Hagan is the Content Writer and Digital Editor for Winvale where she helps the marketing department continue to develop and distribute GSA and government contracting content. Stephanie grew up in Sarasota, Florida, and earned her Bachelor's of Arts in Journalism and Rhetoric/Communications from the University of Richmond.