Active
Small Business
Overview
- Legal name
- WILLIAM W WALKER JR
- Registered location
- HARPSWELL, ME, USA
- Website
- Company website ↗
- Primary NAICS
- 541620 — Environmental Consulting Services
- Latest award activity
- May 4, 2026
Read company summary
WILLIAM W WALKER JR is associated with UEI NW83UBCW3CJ5 and CAGE 1YFU8 in public federal records. AcornBids currently links 2 prime awards totaling $350.0K in obligations to this entity. Its largest recorded federal customer by obligations is Department of the Interior. Its recorded federal awards include work classified as Environmental Consulting Services. These categories describe the loaded award records, not a complete list of company capabilities. Its primary SAM.gov NAICS is 541620 (Environmental Consulting Services). Its public SAM.gov registration lists HARPSWELL, ME, USA.
At a glance
Lifetime prime obligations$350.0K
Prime awards2
Awards with future end dates1
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 Sep 28, 2026. Refresh pending; these totals may be out of date.
Business information
Public SAM.gov registration details.
- Legal name
- WILLIAM W WALKER JR
- UEI
- NW83UBCW3CJ5
- CAGE
- 1YFU8
- Registered address
- 51 POTTS POINT RD, HARPSWELL, ME, 04079, USA
- Registration status
- Active
- Primary NAICS
- 541620 — Environmental Consulting Services
- SAM activation
- Mar 2, 2026
- Initial registration
- May 10, 2002
- Entity start
- Jan 1, 1978
- SAM updated
- Mar 2, 2026
- Registration expires
- Feb 26, 2027
- Fiscal year end
- Dec 31
- Place of incorporation
- ME, USA
Federal award analysis
Net transaction obligations by federal fiscal period.
Transaction history is not available in the loaded data. Annual funding is not estimated from current award totals.
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 |
|---|---|---|---|---|
| 140P5425C0014SERVICE, WATER QUALITY ANALYSES & MODELING SERVICE | Department of the Interior | $185.0K | Sep 5, 2025 | Sep 30, 2026 |
| 140P5424C0026SERVICE, WATER QUALITY ANALYSIS AND MODELING SERVICES | Department of the Interior | $165.0K | Sep 18, 2024 | Sep 30, 2025 |
Upcoming positioning windows
Modeled recompete windows are estimates, not announced solicitations or guarantees.
Registration, certifications & contacts
| Registration evidence | Date |
|---|---|
| SAM updated | Mar 2, 2026 |
| Source loaded | Sep 26, 2026 |
| Initial registration | May 10, 2002 |
| Entity start | Jan 1, 1978 |
Registration classifications: Small Business. These are separate from the reported certificates above.
| Industry | Reported size status |
|---|---|
| 541330 — Engineering Services | Not reported |
| 541620 — Environmental Consulting Services | Not reported |
| Contact | Role | Published contact methods | Evidence | Source date |
|---|---|---|---|---|
| WILLIAM W WALKER | Government business | Contact method not published | SAM registration | Not available |
| WILLIAM WALKER | Alternate government business | Contact method not published | SAM registration | Not available |
| WILLIAM W WALKER | Electronic business | Contact method not published | SAM registration | Not available |
| WILLIAM WALKER | Alternate electronic business | Contact method not published | SAM registration | Not available |
Registered industries
- 541330 — Engineering Services
- 541620 — Environmental 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 WILLIAM W WALKER JR
What products and services appear in its federal awards?
Recorded award industries: 541620 — Environmental Consulting Services.
Recorded products and services: B533 — Water Quality Studies.
Examples from recent award records:
- SERVICE, WATER QUALITY ANALYSES & MODELING SERVICE
- SERVICE, WATER QUALITY ANALYSIS AND MODELING SERVICES
These records describe federal award work, not every company capability. Review the award evidence.
Where is the company registered?
51 POTTS POINT RD, HARPSWELL, Maine 04079, United States
Registered location from SAM.gov; award performance locations may differ.
What is its primary registered industry?
541620 — Environmental Consulting Services.
Primary SAM.gov NAICS classification.
Which federal agencies are represented in its awards?
Department of the Interior.
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.
No official subaward rows are loaded, so Acorn does not claim known teaming relationships.
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