Hellmuth, Obata & Kassabaum, Inc.
St. Louis, MO Part of Hok, Inc.
- UEI
- CQJLYUAF62J3
- CAGE
- 3JYX6
- Primary NAICS
- 541310 Architectural Services
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
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- 541310 Architectural Services Primary
- 541320 Landscape Architectural Services
- 541330 Engineering Services
- 541350 Building Inspection Services
- 541410 Interior Design Services
- 541430 Graphic Design Services
- 541490 Other Specialized Design Services
- 541611 Administrative Management and General Management Consulting Services
- Corporate family
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Hok, Inc.
Parent
DHZRTAFD81L3
- Hellmuth, Obata & Kassabaum, Inc. CQJLYUAF62J3
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Hok, Inc.
Parent
DHZRTAFD81L3
- SAM.gov registration date
- Physical address
- 701 Market St Suite 400, St. Louis, MO 63101, USA
- Website
- hok.com
- Founded
- 1955
- Employees
- 1K-5K
- Estimated annual revenue
- $250M-$500M
- Industry
-
- Industrials
- Commercial & Professional Services
- Professional Services
- Architecture
- SIC code
- 87 Engineering & Management Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Furniture design service award and related services, the US nuclear regulatory commission, at 245 peachtree center AVE… | Region 5 | $165,530 | |
| Lead design architect new united states courthouse in chattanooga, TN | Region 4 | $17,454,020 | |
| Hurricane repair project, george c young FB & CH, 400 w. Washington ST., orlando, FL 32801 & annex u.s. CH, 401 w.… | Region 4 | $2,376,551 | |
| A/e services 2ND & 3RD floor renovations, one white flint north building, 11555 rockville pike, rockville, MD 20852. | National Capital Region | $2,577,840 | |
| Architect engineering services to design region 7 headquarters 12TH floor space, fort worth, texas | Region 7 | $299,156 |
About Hellmuth, Obata & Kassabaum, Inc.
Hellmuth, Obata & Kassabaum, Inc. (HOK) is a global design and architecture firm registered in the federal government's System for Award Management (SAM) since 2003. As a for-profit corporate entity, HOK specializes in providing comprehensive architectural, engineering, and interior design services to federal agencies. The firm has established itself as a prominent service provider for government facility design and renovation projects, demonstrating expertise in creating functional and innovative spaces for various federal institutions.
HOK has been awarded multiple federal contracts across different agencies, primarily focusing on architectural and engineering services for government buildings. These contracts include design work for courthouses, government office renovations, and facility support projects. The firm has received contracts from agencies such as the U.S. Nuclear Regulatory Commission (NRC), General Services Administration (GSA), and Commodity Futures Trading Commission (CFTC). The contract awards range from furniture design services to comprehensive building renovation projects, with contract values spanning from $165,529 to $17,435,953. None of the contracts were designated as small business set-asides, indicating HOK's established status in federal contracting. The firm frequently collaborates with subcontractors like Imeg Consultants Corp., Wiss, Janney, Elstner Associates, Inc., and Ocmi Inc. to provide specialized engineering, building envelope, and cost estimation services.
HOK holds a significant $125 million multiple-award Indefinite Delivery, Indefinite Quantity (IDIQ) contract with the GSA, specifically for the National Architecture, Engineering, and Interiors services. This contract, awarded in November 2022, has a base period of 5 years with four additional 1-year option periods, extending until November 2027. Under this IDIQ vehicle, HOK has received numerous task orders from various federal agencies, covering a wide range of services including office space renovations, hurricane repair projects, facility support, and design services for federal buildings. The contract allows HOK to provide nationwide architectural, engineering, and interior design services across multiple federal agencies, with task orders targeting specific regional office improvements, courthouse designs, and facility support projects.
Contract vehicles
Quick answers
What is Hellmuth, Obata & Kassabaum, Inc.'s UEI?
Hellmuth, Obata & Kassabaum, Inc.'s Unique Entity ID (UEI) in SAM.gov is CQJLYUAF62J3.
What is Hellmuth, Obata & Kassabaum, Inc.'s CAGE code?
Hellmuth, Obata & Kassabaum, Inc.'s CAGE code is 3JYX6.
What is Hellmuth, Obata & Kassabaum, Inc.'s primary NAICS code?
Hellmuth, Obata & Kassabaum, Inc.'s primary NAICS code is 541310 (Architectural Services).
Where is Hellmuth, Obata & Kassabaum, Inc. located?
Hellmuth, Obata & Kassabaum, Inc.'s physical address in SAM.gov is 701 Market St Suite 400, St. Louis, MO 63101, USA.
Is Hellmuth, Obata & Kassabaum, Inc. registered in SAM.gov?
Yes. Hellmuth, Obata & Kassabaum, Inc.'s SAM.gov registration is active through December 11, 2026.
Who is Hellmuth, Obata & Kassabaum, Inc.'s parent company?
Hellmuth, Obata & Kassabaum, Inc. is part of Hok, Inc.
Which contract vehicles does Hellmuth, Obata & Kassabaum, Inc. hold?
Hellmuth, Obata & Kassabaum, Inc. holds a place on 1 federal contract vehicle: National Architecture, Engineering, and Interiors.
What is Hellmuth, Obata & Kassabaum, Inc.'s most recent federal award?
Hellmuth, Obata & Kassabaum, Inc.'s most recent federal contract award is Furniture design service award and related services, the US nuclear regulatory commission, at 245 peachtree center AVE… (47PF0025F0701), from Region 5, on August 19, 2025.
On GovTribe
See Hellmuth, Obata & Kassabaum, Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
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