OST Inc
OST Inc received $20.5M in federal prime contract obligations in the 12 months ending Oct 5, 2026, down 60.9% from $52.5M the year before, and $283.8M since FY2022. Its largest customer is the Department of Defense.
Contractor details
- Unique Entity ID (UEI)
- FPLRRX1M2YS5
- CAGE code
- 1NCB1
- Doing business as
- Optimal Solutions and Technolo
- Headquarters
- Washington, DC
- Business size
- Other Than Small Business
As recorded on this UEI's most recent prime contract action in USAspending.gov. Confirm current registration and certifications in SAM.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year.
Markets where it ranks top 10
Agency and NAICS markets where this UEI is one of the ten largest primes in the latest 12 months.
Top agencies
Funding agencies ranked by obligations since FY2022.
| Funding agency | Latest 12 mo | Since FY2022 |
|---|---|---|
| Department of Defense | $19.8M | $214.6M |
| Department of Homeland Security | $708K | $69.1M |
| Department of Transportation | $0 | $284K |
Top NAICS codes
Industry codes agencies recorded on this contractor's awards, since FY2022.
| NAICS | Industry | Latest 12 mo | Since FY2022 |
|---|---|---|---|
| 541330 | Engineering Services | $558K | $195.3M |
| 541990 | All Other Professional, Scientific, and Technical Services | $708K | $73.0M |
| 541350 | Building Inspection Services | $19.2M | $19.2M |
| 541712 | Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) | $0 | $590K |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $500 | $2K |
What it sells
Product and service codes (PSC) on this contractor's awards, since FY2022.
| PSC | Description | Since FY2022 |
|---|---|---|
| R408 | Support- professional: Program Management/Support | $266.9M |
| R499 | Support- professional: Other | $19.2M |
| D302 | IT and Telecom- Systems Development | $2.1M |
| AD26 | R&D- Defense other: Services (Management/Support) | $590K |
| AC13 | National Defense R&D services; Department of Defense - military; Experimental Development | $2K |
Recent awards
This contractor's newest prime contract awards, most recent first.
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| W900KK26FA025 | Department of Defense SYSTEMS ENGINEERING AND TECHNICAL ASSISTANCE BRIDGE | $9.4M | Jan 30, 2026 |
| HQ085926FE078 | Department of Defense SCALABLE HOMELAND INNOVATIVE ENTERPRISE LAYERED DEFENSE (SHIELD) INITIAL ORDER. | $500 | Dec 4, 2025 |
| 70FA6025F00000032 | Department of Homeland Security STAFF WILL COORDINATE WITH THE WRITE YOUR OWN INSURANCE COMPANIES AND THE NFIP DIRECT CONTRACTOR AS THEY WORK TOGETHER TO PROVIDE THE INFORMATION REQUIRED BY THE NFIP. THE… | $6.1M | Sep 30, 2025 |
| W900KK25FA015 | Department of Defense TASK ORDER FOR PROJECT MANAGER SYNTHETIC ENVIRONMENT (PM SE) | $6.3M | Feb 14, 2025 |
| W900KK25FA017 | Department of Defense SETA II NEW TASK ORDER FOR PROJECT LEAD ENTERPRISE TRANSFORMATION AND INTEGRATION | $454K | Feb 12, 2025 |
| W900KK25FA013 | Department of Defense TASK ORDER FOR SYSTEMS ENGINEERING AND TECHNICAL ASSISTANCE (SETA) SUPPORT TO PROJECT MANAGER TRAINING DEVICES. (PM TRADE) | $11.1M | Feb 7, 2025 |
| W900KK25FA014 | Department of Defense TASK ORDER PROJECT LEAD TADSS SUPPORT OPERATIONS | $6.5M | Feb 6, 2025 |
| W900KK25FA008 | Department of Defense SYSTEMS ENGINEERING AND TECHNICAL ASSISTANCE II (SETA II). NEW TASK ORDER FOR PROJECT MANAGER FOR CYBER, TEST, AND TRAINING (PM CT2). | $5.4M | Feb 6, 2025 |
Prime contracts (award types A–D) from USAspending.gov through Oct 5, 2026. Subcontracts are not included. Net obligations include deobligations and corrections.
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