Buyers Guidance and Resources

How to Use OASIS

The GSA OASIS Tier 3, Best-in-Class (BIC) solutions make procuring complex professional services expedient by maximizing streamlined acquisition processes. The following resources are designed to help buyers use the OASIS suite of contracts.

Two ways to access OASIS:

  • Direct Acquisition - GSA issues a Delegation of Procurement Authority to the customer agency Ordering Contracting Officer (OCO) who performs the acquisition; or
  • Assisted Acquisition - GSA performs the acquisition on behalf of the customer agency and provides post-award support, as negotiated with the customer. An Inter-Agency Agreement is required.

The OASIS Master Contract and OASIS SB Master Contract will help your agency acquire professional services for integrated solutions more efficiently and economically.

8(a) Program Update: Please be informed that the 8(a) Sole Source Limitations at FAR 19.805-1(a)(2) has increased from $4.0M to $4.5M and FAR 19.808-1(a) has increased from $22M to $25M by way of FAC 2021-01.

GSA offers an optional OASIS scope review that analyzes the scope and Pool assignment of your proposed requirement.

To request a scope review you must:

  1. Complete the OASIS Scope Review Online form.
  2. Use the OASIS NAICS Code definitions document [PDF - 177 KB] to choose the North American Industry Classification System (NAICS) code representing the principle purpose of your requirement
  3. Input that NAICS code and corresponding pool in the Primary NAICS field of the form. Example for military engineering: “NAICS 541330 Exception A (Pool 3)”
  4. Complete your Statement of Work (SOW)
  5. Complete your Independent Government Cost Estimate (IGCE) using your Agency’s government estimate with labor categories and hours template or generated using the OASIS Price Estimating Tool

We cannot complete the scope review until the completed scope review form, SOW and IGCE have been received. Note: If you do not hear back within five business days of submitting all documents, email for update.

Check out this video on the topic: The Importance of Scope Reviews

Place an Order Through OASIS

You can place an order through GSA eBuy, the OASIS Contractor List (OCL), and Symphony Procurement Suite.

GSA eBuy is a powerful and intuitive acquisition tool used by thousands of US federal agencies and military services worldwide to achieve required competition, best pricing and value. GSA eBuy saves you time and money - all while keeping you FAR compliant.


Symphony is the preferred task order management tool for the One Acquisition Solution for Integrated Services (OASIS) program. You may use Symphony, eBuy, or GSA ASSIST to solicit responses to task order requests for proposals (RFPs), requests for information (RFI), and other market research.

OASIS U, SB, and 8(a) Contractors [XLSX - 1 MB] (Updated Weekly)

OASIS uses Symphony Procurement Suite (the commercial-off-the-shelf software), to issue, manage and award task orders.

Symphony is a full lifecycle procurement Software as a Service (SaaS) allowing government organizations to manage complex contracts. Symphony ensures organizations are purchasing according to fair opportunity laws and rules. Symphony provides users increased transparency and integrity at both the master contract level and task order level.

This Symphony Task Order System Reference Guide for Industry [PDF - 134 KB] highlights important resources and links to help you navigate the tool.

Check out this short video: Symphony - The Task Order Tool That Works For You.

Important links to note:

Questions about Symphony? Email:

Contract Features

The OASIS program has created a variety of crosswalks to guide buyers through the acquisition process.

Review the North American Industry Classification System (NAICS) Code Definitions by OASIS Pool Numbers [PDF - 177 KB]

  • All codes/exceptions in a pool share a common small business (SB) size standard.
  • Agencies can solicit task order proposals from contractors holding awards in the pool with the NAICS code that matches the agency's requirement.

The core disciplines/scopes of the contracts include:

  • The labor categories are aligned with occupations, as outlined in the Office of Management and Budget's (OMB) Standard Occupational Classification (SOC) system.

  • OASIS offers more meaningful proposed rate comparisons at the Task Order level (apples to apples)
    • 104 OASIS LCATs (individual and groups priced at the master contract level)
    • 127 OMB SOC occupations, and
    • 1,000 typical industry job titles
  • The remaining 840 SOC occupations can be added and priced at the task order level as ‘ancillary labor'

The OASIS Labor Category Crosswalk Table [XLSX - 81 KB] compares Industry's functional job descriptions and specific the Office of Management and Budget (OMB) Standard Occupational Classification (SOC) system occupational descriptions. In this table, you will find more than a thousand industry job titles with suggested SOC occupation and OASIS LCAT matches.

The OASIS Table of PSC codes by OASIS pool number [XLSX - 67 KB] is excerpted from Federal Procurement Data System-Next Generation (FPDS-NG) and only includes those in scope. Select the link to search for your Pool number and the various possible PSC Codes that may apply. (Note: The white drop down arrows on the table will streamline the process.)

Note: Ordering Contracting Officers (OCOs) are required to identify, in each task order solicitation, the PSC that represents the principal nature of the work, and report these PSCs in FPDS-NG.

The core disciplines/scopes of the contracts include:

OASIS Unrestricted is a Full and Open contract whereas OASIS Small Business is a 100 percent Small Business Set-Aside contract (FAR 19.502) with the ability to do Socio-Economic Set-Asides (FAR 19.8 thru FAR 19.15) at the task order level. The OASIS8(a) SubPools were developed to provide the 8(a) community expanded access to the OASIS Best-in-Class contract program while creating more options for federal agencies to meet their 8(a) business development program goals through both competitive 8(a) set-asides and 8(a) directed task order awards.

OASIS Unrestricted and OASIS Small Business are a family of 7 separate Governmentwide Multiple Award, Indefinite Delivery, Indefinite Quantity (MA-IDIQ) task order contracts that span 28 NAICS Codes and 6 NAICS Code Exceptions under the economic subsector 541 - Professional, Scientific, and Technical Services.

OASIS contract end dates:

  • Unrestricted: September 2, 2024
  • Small Business: December 19, 2024
  • 8(a): December 19, 2024

In accordance with FAR 52.216-22, Indefinite Quantity, paragraph (d), any task order issued during the active period of performance of the master contracts may proceed up to five years following the expiration of the contract ordering period. (Eg., a task order issued on the last day of the IDIQ's active period of performance may be issued for a base and four option periods, and all option periods can be exercised per the Ordering Contracting Officer's (OCO) determination).

The OASIS contracts have different start dates, due to onramps that followed the initial awards; therefore, we aren't publishing the start date of the contracts. If you need to know a specific contract's start date, please contact the OASIS Program Office at

Below are copies of the OASIS Unrestricted, OASIS Small Business Contracts, and OASIS Small Business 8(a) Subpool Contracts:

Contract Associated Documents
OASIS Unrestricted Contracts
OASIS Small Business Contracts
OASIS 8(a) Contracts

Below is a list of agencies that have signed a Memorandum of Understanding to use the OASIS contracts and the related reduced Contract Assessment Fee (CAF) rate percentages.

Receiving Agency Negotiated CAF Rate Percentage
DOD Defense Procurement and Acquisition Policy (DPAP) [PDF - 1 MB] 0.10%
US Air Force [PDF - 83 KB] 0.10%

US Army [PDF - 504 KB]

Addendum to MoU [PDF - 64 KB]

US Navy [PDF - 96 KB] 0.10%
Department of Homeland Security [PDF - 70 KB] 0.25%

Centers for Medicare and Medicaid Services (CMMS) [PDF - 227 KB]

*(CMMS is a Bureau within The Department of Health and Human Services (HHS)).


Research Tools

These tools are designed to help buyers make better program and business decisions.

Launch the OASIS Dashboard

The OASIS Program created a tool that takes its data to the next level. OASIS stakeholders can now view and segment OASIS information to make better program and business decisions.

With the OASIS Dashboard, you have the ability to:

  • Explore OASIS and OASIS SB data by federal agency and industry partner; and
  • Build customized reports and download them to your computer.

Notice to Users: GSA strives to comply with Section 508 of the Rehabilitation Act of 1973. Some of the dashboard content presented through .swf files may not be completely accessible to users of assisted technology. If you experience technical issues, please contact BIEDW Support.

For content questions, please email OASIS Customer Support.

The Contract-Awarded Labor Category (CALC)tool helps federal contracting officers and others find awarded prices to use in negotiations for labor contracts. It offers ceiling prices, fully burdened costs, services data, and worldwide rates.

The OASIS Price Estimating Tool has been decommissioned and is no longer available. Please use the PET Resource tool (available on PET page) to develop labor rate estimates applicable to the OASIS Multiple Award Contract labor categories defined in Section J.1. Attachment 1, of the OASIS contract.

OASIS Contractor Capability Statements pulled together by the OASIS Shared Interest Groups (OSIGs).

Other Resources

Agency customers are encouraged to reach out to the National Customer Service Center about FAS Sales Reporting, TDR training, user manuals and general customer inquiries.

Last Reviewed: 2023-05-19