Client / Server Software Solutions Inc.
Vienna, VA Doing business as Constellation West
- UEI
- CMSHG28J2L78
- CAGE
- 1HYP0
- Primary NAICS
- 541330 Engineering Services
- SAM.gov registration
- Active through
Company facts
- SBA certifications
-
Women-Owned Small Business· Current
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
-
- 541330 Engineering Services Primary
- 336611 Ship Building and Repairing
- 488190 Other Support Activities for Air Transportation
- 488999 All Other Support Activities for Transportation
- 541360 Geophysical Surveying and Mapping Services
- 541511 Custom Computer Programming Services
- 541512 Computer Systems Design Services
- 541513 Computer Facilities Management Services
Show all
- 541519 Other Computer Related Services
- 541611 Administrative Management and General Management Consulting Services
- 541612 Human Resources Consulting Services
- 541614 Process, Physical Distribution, and Logistics 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
- 611512 Flight Training
- SAM.gov registration date
- Physical address
- 8230 Old Courthouse Rd # 220, Vienna, VA 22182, USA
- Website
- constellationwest.com
- Founded
- 1997
- 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 .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| API common services- information technology services to operate, maintain, and modernize internal revenue service… | Internal Revenue Service | $1,542,045 | |
| Fopr 25-002 national airborne operations center (naoc) J3T special access program (SAP) security and support for… | Air Combat Command | $441,064 | |
| Provide microsoft 365 (M365) core program oversight and support program management office activities at the enterprise… | Internal Revenue Service | $3,353,719 | |
| Missile operations support for usstratcom | Air Combat Command | $708,640 | |
| Patch automation support | Internal Revenue Service | $989,643 |
About Client / Server Software Solutions Inc.
Client / Server Software Solutions Inc., doing business as Constellation West, is a versatile small business federal government contractor specializing in mission-critical information technology services and professional solutions. Registered in SAM.gov since 2001, the company is certified as a Woman-Owned Small Business, Service-Disabled Veteran-Owned Small Business, and Veteran-Owned Business. Constellation West provides comprehensive technology services across defense, intelligence, health, and civilian sectors, leveraging its expertise in IT infrastructure, cybersecurity, systems engineering, and strategic consulting to support complex government missions.
The company has secured numerous high-value federal contracts across multiple agencies, with a significant focus on national security and strategic support services. Constellation West has provided critical services to the U.S. Air Force, including Nuclear Command, Control, and Communications (NC3) Enterprise Center mission support, missile operations support, personnel recovery mission software management, and deterrence analysis and planning support. For the Internal Revenue Service, the company has delivered Microsoft 365 program oversight, cybersecurity policy support, automated collections system management, and COVID-19 related IT services. Many of these contracts were awarded under set-aside designations for Service-Disabled Veteran-Owned Small Businesses or through competitive procurement processes, with contract values ranging from approximately $377,000 to over $76 million. The company frequently collaborates with major prime contractors like Northrop Grumman, Accenture Federal Services, and Peraton Inc. as a subcontractor.
Constellation West holds several critical Indefinite Delivery Contract (IDV) vehicles that enable broad service delivery across federal agencies. These include the One Acquisition Solution for Integrated Services (OASIS) Small Business contract, the upcoming OASIS+ Small Business contract, and OASIS+ specific set-aside contracts for Women-Owned and Service-Disabled Veteran-Owned Small Businesses. The Federal Supply Schedule contract further expands their ability to provide IT professional services. These IDVs cover a comprehensive range of services including management and advisory support, technical and engineering services, research and development, intelligence services, environmental services, facilities management, and logistics. The contract vehicles have massive potential ceiling values, with some approaching $1 trillion, and typically feature 5-year base periods with potential 5-year extensions. Major agencies utilizing these contracts include the Department of Defense, Air Force, Marine Corps, Department of the Treasury, and Defense Information Systems Agency, demonstrating Constellation West's broad capabilities and strategic importance in federal IT service provision.
Contract vehicles
- Information Technology Schedule 70
- Multiple Award Schedule
- OASIS+ SDVOSB IDIQ
- OASIS+ WOSB IDIQ
- One Acquisition Solution for Integrated Services Plus - Total Small Business
- One Acquisition Solution for Integrated Services Plus - Unrestricted
- Responsive Strategic Sourcing for Services
- Seaport Next Generation
- Total Information Processing Support Services 4
- 8a Streamlined Technology Acquisition Resources for Services
- Alliant 2 Small Business - CANCELLED
- One Acquisition Solution for Integrated Services - Small Business
SBA capabilities narrative
We maintain highly qualified, experienced IT staff to provide the most optimal solutions using appropriate emerging technologies. Proven record for successfully providing IT systems, networking, security, and software solutions to a variety of clients.
Quick answers
What is Client / Server Software Solutions Inc.'s UEI?
Client / Server Software Solutions Inc.'s Unique Entity ID (UEI) in SAM.gov is CMSHG28J2L78.
What is Client / Server Software Solutions Inc.'s CAGE code?
Client / Server Software Solutions Inc.'s CAGE code is 1HYP0.
What is Client / Server Software Solutions Inc.'s primary NAICS code?
Client / Server Software Solutions Inc.'s primary NAICS code is 541330 (Engineering Services).
Where is Client / Server Software Solutions Inc. located?
Client / Server Software Solutions Inc.'s physical address in SAM.gov is 8230 Old Courthouse Rd # 220, Vienna, VA 22182, USA.
Is Client / Server Software Solutions Inc. registered in SAM.gov?
Yes. Client / Server Software Solutions Inc.'s SAM.gov registration is active through May 11, 2027.
Which SBA certifications does Client / Server Software Solutions Inc. hold?
Client / Server Software Solutions Inc. holds Women-Owned Small Business certification from the SBA.
Which contract vehicles does Client / Server Software Solutions Inc. hold?
Client / Server Software Solutions Inc. holds a place on 17 federal contract vehicles, including IT-70, MAS and OASIS+ SDVOSB IDIQ.
What is Client / Server Software Solutions Inc.'s most recent federal award?
Client / Server Software Solutions Inc.'s most recent federal contract award is API common services- information technology services to operate, maintain, and modernize internal revenue service… (205AE926F00109), from Internal Revenue Service, on September 17, 2026.
On GovTribe
See Client / Server Software Solutions Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors