Cssi, LLC
Washington, DC
- UEI
- MU5BJR4UM2V3
- CAGE
- 0YUD7
- Primary NAICS
- 541330 Engineering Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 334519 Other Measuring and Controlling Device Manufacturing
- 488111 Air Traffic Control
- 488119 Other Airport Operations
- 488190 Other Support Activities for Air Transportation
- 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
- 541511 Custom Computer Programming Services
- 541512 Computer Systems Design Services
- 541513 Computer Facilities Management Services
Show all 20
- 541519 Other Computer Related Services
- 541611 Administrative Management and General Management 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
- 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- 541990 All Other Professional, Scientific, and Technical Services
- 561499 All Other Business Support Services
- 561990 All Other Support Services
- 611430 Professional and Management Development Training
- 611512 Flight Training
- SAM.gov registration date
- Physical address
- 395 E St SW #200, Washington, DC 20024, USA
- Website
- cssiinc.com
- Founded
- 1990
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
-
- Information Technology
- Software & Services
- Internet Software & Services
- SIC code
- 73 Business Services
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $176,400 |
| FY2026 | $20,931,897 |
| FY2025 | $29,328,907 |
| FY2024 | $33,044,596 |
| FY2023 | $32,461,067 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Transportation | $19,580,046 | |
| 2 | Department of the Navy | $1,528,251 |
Contract vehicles
Contract awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Voluntary safety reporting program support services | Headquarters (FAA) | $7,166,619 | |
| Separation standards analysis support | Technical Center (FAA) | $1,326,000 | |
| New task order for ATO mission support services for policy AJV-p and ATO international AJV-i | Headquarters (FAA) | $12,920,076 | |
| Vids | Naval Information Warfare Systems Command (Navy) | $16,598,309 | |
| Efast PA 22-058-NW system capacity and evaluation support task | Headquarters (FAA) | $1,968,264 |
Latest 5 listed here. See the rest on GovTribe.
Contract subawards
| Prime contractor | Prime award | Amount | Awarded |
|---|---|---|---|
| Science Applications International Corporation | 693KA924F00034 | $395,000 | |
| Science Applications International Corporation | 693KA924F00045 | $75,000 | |
| Science Applications International Corporation | 693KA924F00045 | $150,000 | |
| Science Applications International Corporation | 693KA924F00045 | $75,000 | |
| Science Applications International Corporation | 693KA924F00045 | $80,000 |
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Aurora Innovations, LLC | Alexandria, VA | 541330 Engineering Services |
| EIT | Egg Harbor Township, NJ | 541330 Engineering Services |
| Systems Enginuity, Inc. | Haymarket, VA | 541330 Engineering Services |
| CGH Technologies Inc. | Washington, DC | 541512 Computer Systems Design Services |
| Dtis, LLC | Nokesville, VA | 541330 Engineering Services |
About the company
Cssi, LLC, doing business as Cssi Inc., is a minority and woman-owned small business headquartered in Washington, D.C., that provides professional services to federal agencies. The company specializes in air traffic control engineering, aviation safety analysis, and IT modernization, offering comprehensive technical and operational support across various government domains. Registered in SAM.gov since 2002, Cssi, LLC has established itself as a key contractor for federal agencies, particularly in the aviation and defense sectors, with a focus on delivering specialized engineering services and technical solutions.
Through its prime and sub federal contract awards, Cssi, LLC has provided a wide range of services primarily to the Federal Aviation Administration (FAA) and the Department of the Navy. The company's contract work includes voluntary safety reporting program support, system capacity and evaluation services, separation standards analysis, air traffic control engineering, and mission support for various programs such as System Engineering-2020 (SE-2020). Cssi, LLC has worked on critical initiatives like the Traffic Flow Management System (TFMS), Automation Evolution Strategy (AES), and Visual Integrated Display System (VIDS) upgrades. Most of its contracts are not set aside for specific business categories, indicating the company's ability to compete effectively in full and open competition. The firm has partnered with prime contractors like Science Applications International Corporation, Leidos, Inc., and LS Technologies LLC on numerous subcontract awards.
Cssi, LLC holds two significant Indefinite Delivery Contracts (IDCs): a $6.75 million single-award contract with the Department of Transportation Technical Center and a $400 million multiple-award IDC with the Naval Information Warfare Systems Command. The Technical Center IDC, valid through March 2030, provides engineering services including air traffic control engineering, aviation safety analysis, and IT modernization. The Naval Information Warfare Systems Command IDC, running through May 2026, supports air traffic control engineering, technical, and operational support services. Under these IDVs, Cssi, LLC has received numerous delivery orders for various projects, including TECOM support services, NVS/ASUP program integration, and air traffic control system upgrades. These contracts demonstrate the company's capability to deliver specialized engineering and technical support across complex government programs in aviation and defense domains.
SBA capabilities narrative
SYSTEMS ENGINEERING,SYSTEMS DESIGN & DEVELOPMENT,TECHNICAL & ENGINEERING SUPPORT SERVICES,COMPUTER SCIENCES SERVICES,INTEGRATED LOGISTICS SUPPORT,MAINTENANCE ENGINEERING,TELECOMMUNICATIONS SUPORT SERVICES,PROGRAM MANAGEMENT SUPPORT,PROGRAM REQUIREMENTS AN
Quick answers
Is Cssi, LLC registered in SAM.gov?
Yes. Cssi, LLC's SAM.gov registration is active through October 21, 2027.
Which contract vehicles does Cssi, LLC hold?
Cssi, LLC holds a place on 6 federal contract vehicles, including eFAST and Seaport-NXG.
How much has Cssi, LLC received in federal contracts?
Federal contracts obligated $29,328,907 to Cssi, LLC in fiscal year 2025 and $115,942,867 in fiscal years 2023 through 2027.
How does Cssi, LLC rank among federal contractors?
Cssi, LLC ranked #6 in PSC L059, #21 in PSC 5999 and #21 in PSC DH01 in FY2025.
What is Cssi, LLC's most recent federal award?
Cssi, LLC's most recent federal contract award is Voluntary safety reporting program support services (693KA825C00017), from Headquarters (FAA), on June 18, 2025.
On GovTribe
See Cssi, LLC's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors