# SAM #842674820
Unisys OS 2200 Managed System Services for DISA
**Buyer:** DISA IT Contracting Division
**Posted:** September 29, 2026
**Respond By:** October 14, 2026
**Identifier:** 842674820
**NAICS:** 541513, 541512, 518210, 541519
DISA is seeking continued Unisys OS 2200 services to support critical defense operations and users worldwide.
- Government buyer: Defense Information Systems Agency (DISA), including Hosting and Compute (HaC); the Defense Information Technology Contracting Organization (DITCO) is identified in the notice.
- **OEM: Unisys** — the requested services support the Unisys OS 2200 environment.
- Vendor: Science Applications International Corporation (SAIC), the intended sole-source contractor.
- Services support more than 3,000 users and include operating-system provision and maintenance, software updates, 24/7 technical support, third-party software maintenance, administrator training, and modernization.
- Technical requirements include 99.95% system availability, 24/7 support, security patches and STIG compliance, and a two-way Web API integration with E-ICAM for identity and access management.
- The contractor must also develop and maintain a Supply Chain Risk Management plan, including risk assessments and subcontractor approval.
- No product quantities or priced line items are provided; the requirement is for services.
### Description
The Defense Information Systems Agency (DISA)/Defense Information Technology Contracting Organization (DITCO) intends to negotiate a sole source contract with Science Applications International Corporation (SAIC) for commercial Unisys System Services. A sole source Justification & Approval document is being coordinated and, upon approval, a copy of it will be posted here on SAM.gov to comply with the public display requirements of FAR 6.301.
This acquisition will continue to provide DISA HaC with Unisys OS 2200 System Services currently being provided under contract number HC1084-23-D-0002, which expires on November 30, 2026. This procurement will provide DISA HaC the ability to supply Unisys OS 2200 System Services to the current strategic partner (SP) base, in excess of 3,000 users worldwide, utilizing Unisys OS 2200 applications that provide critical support to the warfighter. The scope of this effort will provide a complete managed service that includes flexibility and scope of services sufficient to meet current and future Unisys OS 2200 environment workloads, security, training, and modernization requirements, while ensuring DISA customers receive uninterrupted, continuous access to their applications and data.
[View original listing](https://sam.gov/opp/c1d244e1113845169249e8351a84b96d/view)