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Buy through us
Explore buy through us
Category management
Government property for sale or lease
Personal property (tangible goods)
Real property (real estate and buildings) for public use
Real property sales
Vehicle sales
Products and services
Human capital
Industrial products and services
Office management
Professional services
Security and protection
Transportation and logistics services
Purchasing programs
Assisted acquisition
Commercial platforms
Federal strategic sourcing initiative
Fleet management
HCaTS and HCaTS SB
OASIS and OASIS SB
Requisition programs
State and local programs
Emergency acquisition basic ordering agreements
Shared services
Payroll services
Support services for CABs
Sell to government
Explore sell to government
Step 1: Learn about government contracting
Ways you can sell to government
How to access contract opportunities
Conduct market research
Step 2: Compete for a contract
Register your business
Certify as a small business
Become a schedule holder
Market your business
Research active solicitations
Respond to a solicitation
What to expect during the award process
Step 3: Manage your contract
Comply with contractual requirements
Handle contract modifications
Monitor past performance evaluations
Real estate
Explore real estate
Design and construction
3D-4D building information modeling
Computer-aided design standards
Engineering
Project management information system
Prospectus thresholds
Facilities management
Security
Tenant services
Water quality management
Our properties
Owned and leased properties
Regional buildings
Renting property
Real estate services
Leasing
Real property disposal
Reimbursable services (RWA)
For businesses seeking opportunities
For workers in federal buildings
Voice of the customer
Workplace optimization
Commercial coworking
Federal coworking
Policy and regulations
Explore policy and regulations
Acquisition management policy
Aviation management policy
Information technology policy
Real property management policy
Relocation management policy
Travel management policy
Vehicle management policy
Regulations
Federal acquisition regulations
Federal management regulations
Federal travel regulations
Small business
Explore small business
Small business goals
Register your business
Explore business models
Research the federal market
Subcontracting and other partnerships
Forecast of contracting opportunities
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Videos
Travel
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Plan a trip
Per diem rates
Transportation (airfare rates, POV rates, etc.)
Lodging
Travel charge card
Travel and lodging services
E-gov travel service (ETS)
Rideshare
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Federal travel regulation
Technology
Explore technology
Build websites and digital services
Purchasing programs
Cloud computing services
Cybersecurity products and services
Governmentwide acquisition contracts
MAS information technology
USAccess
Government initiatives
Artificial Intelligence
Cybersecurity
Emerging citizen technology
FedRAMP
Federal identity, credentials, and access management
Robotic process automation community
Technology modernization fund
Training
About us
Explore about us
Background and history
Overview
Mission and strategic goals
Role in presidential transitions
Careers
Get an internship
Launch your career
Elevate your professional career
Discover special hiring paths
Resources and related links
Events and training
Events, training, and request a speaker
Our training programs
Newsroom
Agency blog
Congressional testimony
GSA does that podcast
News releases
Speeches
Videos
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Leadership directory
Federal Acquisition Service
Public Buildings Service
Staff offices
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Region 1 | New England
Region 2 | Northeast and Caribbean
Region 3 | Mid-Atlantic
Region 4 | Southeast Sunbelt
Region 5 | Great Lakes
Region 6 | Heartland
Region 7 | Greater Southwest
Region 8 | Rocky Mountain
Region 9 | Pacific Rim
Region 10 | Northwest/Arctic
Region 11 | National Capital Region
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  5. Occupancy Agreement Space Inventory System (OASIS)

Occupancy Agreement Space Inventory System (OASIS)

The Public Buildings Service has transitioned from our current occupancy Agreement tool (OATool/eOA) to a new OA application - the Occupancy Agreement and Space Inventory System.

Page contents

  • OASIS Customer User Guide
  • OASIS User Tips & FAQs
  • OASIS System Access and User Roles
  • System Updates and OASIS User Bulletin
  • User Training Videos
  • Information Sessions and Resources
  • Changes to GSA Process for Occupancy Agreements
  • OASIS Benefits

PBS OASIS customer user guide

PBS OASIS Customer User Guide [PDF - 2 MB] (Updated June 10, 2024)

OASIS system access and user roles

Access OASIS at oasiscustomers.gsa.gov. If you experience any problems accessing the system please contact the GSA PBS National Application Help Desk at 866-367-7878 or email at COPBSApp@gsa.gov. Users must have a valid Login.gov account to access OASIS. If you are having difficulties with your account, please visit the Login.gov Help Center for assistance or Login.gov Contact Us for contact information.

To request access to OASIS, complete the PBS OASIS Customer Access Request Form [PDF - 368 KB]

System updates and OASIS user bulletin

To address system issues, OASIS is operating on a “rapid release schedule” with new updates published every two weeks. These updates, along with other pertinent system information, are summarized in bi-weekly OASIS User Bulletins. Review archived bulletins below. To be added to the bulletin distribution, email PBSOASIS@gsa.gov.

  • OASIS Bulletin - January 16, 2024
  • OASIS Bulleting - December 19, 2024
  • OASIS Bulletin - November 21, 2024
  • OASIS Bulletin - October 21, 2024
  • CORRECTION to September 19 OASIS Bulleting - October 7, 2024
  • OASIS Bulletin - September 19, 2024
  • OASIS Bulletin - August 23, 024
  • OASIS Bulletin - July 25, 2024
  • OASIS Bulletin - July 11, 2024
  • OASIS Bulletin - June 27, 2024
  • Special Edition - OASIS Bulletin - Jun 10, 2024 (New Customer Portal/Approval Workflow Rollout)
  • OASIS Bulletin - May 30, 2024
  • OASIS Bulletin - May 16, 2024
  • OASIS Bulletin - May 2, 2024
  • OASIS Bulletin - April 18, 2024

User training video

The PBS OASIS team is releasing several videos related to the new system and related pricing policy changes.

Please see the offerings below.
Note: Videos marked as “NEW” have been updated to reflect the new customer approval workflow and portal effective June 10,2024. All other videos remain accurate, but were developed prior to the new workflow and portal)

  • OASIS Overview & Related Pricing Policy Changes
  • NEW - Customer Portal Overview
  • Occupancy Agreements in OASIS for Customers
  • NEW - Working with Queries
  • Release of Space
  • Scenario Plans in OASIS
  • NEW - Compare OA Versions
  • Joint Use Space Fact Sheet
  • NEW - Submit a Billing Question
  • NEW - How to Approve or Reject OAs Part 1 (OA Approval Form Overview)
  • NEW - How to Approve or Reject OAs Part 2 (Approve, Reject or Clarify an OA (OA Approval Form)

Information sessions and resources

The OASIS transition team has hosted multiple information sessions regarding changes in OA policy and process, as well as training sessions on using the new OASIS system.

You may review resources from past information sessions and trainings including:

PBS OASIS - new customer approval workflow
June 13, 2024

  • Session Recording
  • Session Slide Deck [PDF - 1 MB]

PBS OASIS update and information session
April 11, 2024

  • Session Recording
  • Slide Deck [PDF - 1 MB]
  • Session Q&A

Policy and process changes for occupancy agreements
April 5, 2022

  • Session Video Recording

Additional Resources

  • Agency AB Codes [XLSX - 67 KB]

Changes to GSA processes for occupancy agreements

OASIS provides a more efficient and effective way for customers to manage their OAs, but there are changes associated with the transition. Starting immediately, for occupancies effective in the second half of FY24, GSA will send the first OA right before lease or construction contract award, based upon actual bids. This timing change will greatly reduce the volume of OAs sent to customers. The award OA will document a customer’s financial obligation to GSA once a contract is awarded. All OAs will, therefore, represent a pending contract action waiting for customer approval and OA approval is needed in a timely manner to avoid delaying your project.

As part of the project planning process, GSA will continue to provide Client Project Agreements (CPAs) around 30 months prior to a customer’s occupancy effective date (for non-prospectus projects). For prospectus projects, CPAs will be provided around 12-18 months before OMB submission, at the end of strategic requirements development. The CPA is not a financial commitment. It records the high level parameters for your space and the project’s initial financial estimates. The financial obligation comes later upon approval the OA sent shortly before contract award. Learn more about the CPA here; the financial information is captured in Part 2, section h.

OASIS benefits

OASIS offers many benefits to customers, including:

  • A concise and easy to read OAs
  • Three open fields at the OA level for customer use, e.g., for internal tracking numbers, organization codes/regions, notes, etc.
  • Self-service features such as downloading OAs and associated assignment drawings (where available)
  • Electronic approval of OAs within the system
  • OA status tracking and reporting; notifications and summaries to organize actions
  • Space release request submissions and release of space status tracking/reporting
  • Billing question submissions and tracking

For More Information

If you have any questions or would like additional information, please contact PBSOasis@gsa.gov.

Looking for the OASIS (One Acquisition Solution for Integrated Services) professional services contract? Visit the OASIS and OASIS Small Business page.

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Last updated: May 19, 2025
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    • Maintaining safe environments around high-risk operations
    • USE IT Act and Occupancy Data
    • Occupancy planning and requirements development
    • Opt to lease furniture and IT to save money
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