Federal contractor profile
HELLMUTH, OBATA & KASSABAUM, P.C.
UEI CK9QSQY8MGN4CAGE 0MY56
Active
Overview
- Legal name
- HELLMUTH, OBATA & KASSABAUM, P.C.
- Registered location
- WASHINGTON, DC, USA
- Primary NAICS
- 541310 — Architectural Services
- Latest award activity
- Sep 9, 2026
Read company summary
HELLMUTH, OBATA & KASSABAUM, P.C. is associated with UEI CK9QSQY8MGN4 and CAGE 0MY56 in public federal records. AcornBids currently links 35 prime awards totaling $93.3M in obligations to this entity. Its largest recorded federal customer by obligations is Department of State. Its recorded federal awards include work classified as Engineering Services; Architectural Services. These categories describe the loaded award records, not a complete list of company capabilities. Its primary SAM.gov NAICS is 541310 (Architectural Services). Its public SAM.gov registration lists WASHINGTON, DC, USA.
At a glance
Lifetime prime obligations$93.3M
Prime awards35
Awards with future end dates21
Top-agency concentration
Not available
Why this customer concentration
Detailed agency totals are not available in this stored profile.
Largest positive coded-agency total ÷ all positive coded-agency totals × 100
Missing data is shown as unavailable.
Prime contract obligations across loaded award records. Obligations are not revenue or contract ceilings. Summary updated Oct 6, 2026. Refresh pending; these totals may be out of date.
Business information
Public SAM.gov registration details.
- Legal name
- HELLMUTH, OBATA & KASSABAUM, P.C.
- UEI
- CK9QSQY8MGN4
- CAGE
- 0MY56
- Registered address
- 3223 GRACE ST NW, WASHINGTON, DC, 20007, USA
- Registration status
- Active
- Primary NAICS
- 541310 — Architectural Services
- SAM activation
- Dec 10, 2025
- Initial registration
- Sep 19, 2001
- Entity start
- Dec 28, 1972
- SAM updated
- Dec 10, 2025
- Registration expires
- Dec 8, 2026
- Fiscal year end
- Dec 31
- Place of incorporation
- NY, USA
Research brief
Source facts
- Loaded prime-award records link 35 awards and $93,294,934 in reported obligations to this legal entity. Source
- Recorded awards include Engineering Services (NAICS 541330); this classification is not proof of every company capability. Source
- An example award describes: C100243-DESIGN SERVICES FOR THE COMPLETE DEMOLITION OF BUILDING 9 AND BUILDING 9 INFRASTRUCTURE AND RESTORATION OF THE SITE TO GREEN SPACE. Source
Federal award analysis
Net transaction obligations by federal fiscal period.
Selected transaction obligations$45.1M
Prime contracts
$4.9MFY2017$350.5KFY2018$259.7KFY2019$32.8KFY2020$1.6MFY2021$2.9MFY2022$7.0MFY2023$13.3MFY2024$6.0MFY2025$8.8MFY2026
Reported transaction obligations by federal fiscal period; includes deobligations. Missing transactions are not estimated. Coverage: 35 of 35 selected awards. Select a period to explore its awards.
Recent federal awards
Prime contract awards. Select an award to review its history and source evidence.
| Award / description | Awarding agency | Obligations | Start date | End date |
|---|---|---|---|---|
| 75N99026F00007C100243-DESIGN SERVICES FOR THE COMPLETE DEMOLITION OF BUILDING 9 AND BUILDING 9 INFRASTRUCTURE AND RESTORATION OF THE SITE TO GREEN SPACE. | Department of Health and Human Services | $759.4K | Sep 8, 2026 | Jan 31, 2029 |
| 75N99026F00005C111151 - THIS PROJECT CONSISTS OF PROVIDING STUDY AND 35% DESIGN SERVICES FOR DEMOLITION OF ALL FLOORS OF MOST OF S & T WINGS, A PORTION OF ACRF GARAGE, AND BUILDINGS 59 & 59A… | Department of Health and Human Services | $1.6M | Aug 28, 2026 | Apr 16, 2027 |
| 19AQMM26F1143AWARD OF A&E SERVICES FOR ADVANCING THE HONG KONG SELECTIVE IMPROVEMENTS PROJECT. | Department of State | $4.1M | Aug 13, 2026 | Aug 12, 2027 |
| 75N99026F00006C104536- REMOVING MOSTLY ABANDONED ORIGINAL MOTOR CONTROL CENTERS (MCC-1, MCC-2, MCC-3, AND MCC-4) IN THE B3W10 MECHANICAL ROOM IN BUILDING 38. DERRICK WHITAKER | Department of Health and Human Services | $545.7K | Aug 13, 2026 | Apr 24, 2027 |
| 75N98026F00001C201593 CQM SERVICES FOR CUP LEAK REPAIR AT 36 IN. CHW PIPING, BLDG 11, WAYNE SMALLS | Department of Health and Human Services | $23.0K | Mar 25, 2026 | Oct 31, 2026 |
| 75N99026F00001C201596 - CQM SERVICES FOR VENTILATION UPGRADES AT CUP KTR: AARON ALTMAN COR: VANESSA ARGOTE MACIA CO: CHRIS POSTEK | Department of Health and Human Services | $140.1K | Jan 20, 2026 | Nov 30, 2026 |
| 75N99026F00004C201958-TWO CONDENSER WATER PUMPS WERE INSTALLED APPROXIMATELY THREE YEARS AGO ON AN ELEVATED, STRUCTURAL STEEL PLATFORM WHICH HAS EXPERIENCED EXCESSIVE VIBRATION AND WE NEED TO… | Department of Health and Human Services | $47.7K | Jul 24, 2026 | Nov 23, 2026 |
| 75N99026F00003C104607 - COMMISSIONING SERVICES, BLDG 15B, ZAIRA JIMENEZ | Department of Health and Human Services | $35.9K | Jul 16, 2026 | Oct 30, 2026 |
| 75N99022F00004C100114 B6 AQ - CO #3 - HOK ADD''L A/E SME SERVICES TO PROVIDE ON SITE TECHNICAL SERVICES FROM SME EARL JOHNSON COR: EARL JOHNSON CO: CHRIS POSTEK CPARS: AARON ALTMAN | Department of Health and Human Services | $644.7K | Sep 9, 2022 | Dec 31, 2026 |
| 19AQMM21F1740PLEASE SEE THE UNDER $1 MILLION RFCA SHAREPOINT LINK BELOW FOR OBO DESIGN GUIDE FOR SPECIAL SECURITY ENVIRONMENTS DEVELOPMENT. | Department of State | $525.8K | Jun 16, 2021 | Oct 31, 2026 |
Upcoming positioning windows
Modeled recompete windows are estimates, not announced solicitations or guarantees.
Registration, certifications & contacts
| Registration evidence | Date |
|---|---|
| SAM updated | Dec 10, 2025 |
| Source loaded | Sep 26, 2026 |
| Initial registration | Sep 19, 2001 |
| Entity start | Dec 28, 1972 |
| Industry | Reported size status |
|---|---|
| 541310 — Architectural Services | Not reported |
| 541320 — Landscape Architectural Services | Not reported |
| 541330 — Engineering Services | Not reported |
| 541350 — Building Inspection Services | Not reported |
| 541410 — Interior Design Services | Not reported |
| 541430 — Graphic Design Services | Not reported |
| 541490 — Other Specialized Design Services | Not reported |
| 541611 — Administrative Management and General Management Consulting Services | Not reported |
| 541618 — Other Management Consulting Services | Not reported |
| Contact | Role | Published contact methods | Evidence | Source date |
|---|---|---|---|---|
| RICH CHEN | Government business | Contact method not published | SAM registration | Not available |
| SARAH KEANE | Electronic business | Contact method not published | SAM registration | Not available |
| RICH CHEN | Alternate electronic business | Contact method not published | SAM registration | Not available |
Registered industries
- 541310 — Architectural Services
- 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
- 541618 — Other Management Consulting Services
Registration classifications and published certificates do not by themselves establish eligibility for a particular solicitation. View SAM source
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About HELLMUTH, OBATA & KASSABAUM, P.C.
What products and services appear in its federal awards?
Recorded award industries: 541330 — Engineering Services; 541310 — Architectural Services.
Recorded products and services: C219 — Other Architect and Engineering Services; C119 — Other Buildings; C1JZ — ARCHITECT AND ENGINEERING- CONSTRUCTION: MISCELLANEOUS BUILDINGS.
Examples from recent award records:
- C100243-DESIGN SERVICES FOR THE COMPLETE DEMOLITION OF BUILDING 9 AND BUILDING 9 INFRASTRUCTURE AND RESTORATION OF THE SITE TO GREEN SPACE.
- C111151 - THIS PROJECT CONSISTS OF PROVIDING STUDY AND 35% DESIGN SERVICES FOR DEMOLITION OF ALL FLOORS OF MOST OF S & T WINGS, A PORTION OF ACRF GARAGE, AND BUILDINGS 59 & 59A…
These records describe federal award work, not every company capability. Review the award evidence.
Where is the company registered?
3223 GRACE ST NW, WASHINGTON, District of Columbia 20007, United States
Registered location from SAM.gov; award performance locations may differ.
What is its primary registered industry?
541310 — Architectural Services.
Primary SAM.gov NAICS classification.
Which federal agencies are represented in its awards?
Department of State; Department of Health and Human Services; Millennium Challenge Corporation.
Data coverage and methodology
Sources: SAM.gov registration, USAspending awards and transactions, and linked supporting records. Prime contract obligations, IDV ceilings and assistance amounts are kept separate. Missing records are not zero activity. Company claims are labeled separately. Recompete signals are rule-based scores out of 100. Positioning windows are AcornBids estimates.
Disclosed relationships only. Missing records do not establish that a contractor has no partners. Ambiguous parent award identifiers are excluded.
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