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One Acquisition Solution for Integrated Services (OASIS)

Tier 3 OASIS Contracts

The One Acquisition Solution for Integrated Services (OASIS) is a government-wide multiple awards, indefinite delivery, indefinite quantity (MA-IDIQ) task order contract. GSA’s OASIS Tier 3  is designed to address government agencies needs for a full range of professional service requirements for solutions that span multiple core professional service disciplines (program management, management consulting, logistics, engineering, scientific, and financial); contain significant IT components (but are not IT requirements themselves); contain ancillary support components [commonly referred to as other direct costs (ODCs)]; allow flexibility for all contract types at the task order level; and integrate multiple professional service disciplines. GSA’s OASIS Tier 3, Best-in-Class (BIC) solutions make procuring complex professional services expedient by maximizing streamlined acquisition processes.

  • Provides a single solution for complex requirements
  • Supports multiple technical disciplines and mission spaces
  • Supports commercial and non-commercial acquisition
  • Supports all contract types, including hybrids and cost-reimbursement, at the task order level
  • Allows ancillary support components, commonly referred to as Other Direct Costs (ODC), at the task order level
  • Has no program ceiling, a five-year base and one five-year option a benefit to long-term planning for complex program requirements

OASIS Core Disciplines

  • Program Management services
  • Management Consulting Services
  • Research and Development
  • Logistics Services
  • Engineering Service
  • Scientific services; and
  • Financial services
  • Engineering services

Additional Features of OASIS Contracts:

  • Commercial and non-commercial services.
  • CONUS and OCONUS requirements.
  • Classified and unclassified services.
  • Ancillary support necessary to deliver a total solution, such as labor, materials and ODCs.
  • Hybrid of any of the above.
  • Designated Best-in-Class (BIC) solution helping agencies meet their spend under management goals.

RTI International is an active authorized contract holder on the OASIS contract.


RTI Cage Code: 

OASIS Pool 1 Unrestricted Full & Open  
Management/Scientific/Technical Services 
Contract Number: 47QRAD21DU101
OASIS Pool 1 Conformed Contract
GSA OASIS Mass Mod A878 Pool 1

541330 Engineering Services
541360 Geophysical Surveying and Mapping Services
541370 Surveying And Mapping (Except Geophysical) Services
541380 Testing Laboratories
541611 Administrative Management and General Management Consulting Services
541612 Human Resources Consulting Services
541613 Marketing Consulting Services
541614 Process, Physical Distribution, and Logistics Consulting Services
541618 Other Management Consulting Services
541620 Environmental Consulting Services
541690 Other Scientific and Technical Consulting Services

Current Option Period End Date: September 2, 2024

OASIS Pool 2  Contract Number: GS00Q14OADU217  Current Option Period End Date: September 2.2024
OASIS Pool 2 Conformed Contract
GSA OASIS Mass Mod A878 Pool 2

Financial/Accounting Services

541211 Offices of Certified Public Accountants
541213 Tax Preparation Services
541214 Payroll Services
541219 Other Accounting Services
541720 Research and Development in the Social Sciences and Humanities

Current Option Period End Date: September 2.2024

OASIS Pool 4: Scientific Research and Development (R&D)  
Contract Number  47QRAD20DU421
OASIS Pool 4 Conformed Contract
GSA OASIS Mass Mod A878 Pool 4

541713 Research and Development in Nanotechnology
541714 Research and Development in Biotechnology (except Nanobiotechnology)
541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

Current Option Period End Date: September 2, 2024

OASIS Website

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