Shannon & Wilson Inc.
Seattle, WA Corporate Headquarters
- UEI
- KJZTRPLEXUN9
- CAGE
- 5A336
- 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
- Corporate family
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- Shannon & Wilson Inc. UTLTVE89JJG6
- Pasco, WA VLMGFK8YUKK6
- Jacksonville, FL HQ2QTF419M88
- Anchorage, AK M1NZA1TEJQF5
- Fairbanks, AK CWGYMNX9D228
- Olivette, MO KN1BGLMKXRL5
- Wheat Ridge, CO FV2AX5XH4NT3
- Murray, UT EC3FHUFWKN41
- Lake Oswego, OR MMC9F7QGEJ76
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- SAM.gov registration date
- Physical address
- 400 N 34th St #100, Seattle, WA 98103, USA
- Website
- shannonwilson.com
- Founded
- 1954
- Employees
- 251-1K
- Estimated annual revenue
- $10M-$50M
- Industry
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- Industrials
- Capital Goods
- Construction & Engineering
- Civil Engineering
- SIC code
- 87 Engineering & Management Services
- Profiles
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 | $0 |
| FY2026 | $509,544 |
| FY2025 | $1,779,896 |
| FY2024 | $1,423,104 |
| FY2023 | $1,239,937 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $513,963 |
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Contract subawards
| Prime contractor | Prime award | Amount | Awarded |
|---|---|---|---|
| HDR Engineering, Inc. | 140P2024F0031 | $77,829 | |
| HDR Engineering, Inc. | 140P2025F0055 | $101,080 | |
| HDR B&V JV | W912DS26FA008 | $128,046 | |
| HDR Engineering Inc. | 47PL0323F0001 | $195,800 | |
| Burns & Mcdonnell Engineering Company, Inc. | W912DW25F2030 | $371,505 |
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| HDR Architecture, Inc. | Seattle, WA | 541310 Architectural Services |
| Tetra TECH Divisions | Seattle, WA | 541330 Engineering Services |
| Moffatt & Nichol | Long Beach, CA | 541330 Engineering Services |
| Blackburn Consulting | Auburn, CA | 541330 Engineering Services |
| GEI Consultants Inc. | Wakefield, MA | 541330 Engineering Services |
About the company
Shannon & Wilson Inc., a Seattle-based geotechnical and civil engineering consulting firm, serves federal agencies predominantly as a prime contractor (97% of recent awards) on architect-engineer and geotechnical investigation work, with no SBA set-aside designations across its footprint. The firm operates under NAICS 541512 (Engineering Services) and related architectural and remediation services codes, delivering subsurface investigations, geological explorations, engineering analyses, and expert consulting for infrastructure projects including dams, levees, fish passage facilities, and transportation assets across the Pacific Northwest and nationally.
Shannon & Wilson's customer concentration centers on the U.S. Army and its subordinate commands. The Department of the Army Corps of Engineers dominates both award count and dollar value: the Corps' Seattle District alone accounts for 75 awards valued at $42.7 million (representing 53% of the firm's combined potential value), while the Corps' broader organization adds 45 awards worth $17.4 million. Together, Army Corps accounts for 76% of the combined potential value across all awards. The Department of Homeland Security Coast Guard follows by award count (160 awards) but carries lower per-award magnitude, reflecting a different engagement pattern. The Department of the Navy (22 awards) and Department of Transportation Federal Highway Administration (6 awards, $870 thousand) round out the active set. This concentration signals deep, sustained relationships with Corps districts in the Pacific Northwest — Seattle, Walla Walla, and Portland boundaries — but also indicates potential revenue cliff if major Corps IDIQs or their task-order flow contract.
Shannon & Wilson holds positions on five major Army Corps indefinite-delivery contracts: W912DW09D1005 (30 task orders, $4.6 million combined potential value), DACW6891D0004 (24 task orders), DTCG5000D643RV3 (23 task orders), DACA6794D1014 (20 task orders), and DACA8594D0009 (20 task orders). A newly awarded $20 million IDIQ (April 24, 2026) for architect-engineer services supporting regional geotechnical work in the Northwestern Division runs through April 24, 2031. Representative recent prime work includes a $4.4 million delivery order (July 30, 2026) from the Army Corps' Seattle District for geotechnical engineering during construction at the Howard A. Hanson Dam Fish Passage Facility in Ravensdale, Washington, running through September 29, 2028; a $4.1 million delivery order (September 12, 2023) for hard-rock geologic explorations under an existing $5 million USACE contract; and a $220,919 purchase order (December 12, 2024) from the Franchise Acquisition Services for a geotechnical survey at the Biorka, Alaska Airport Traffic Control Base Intersection.
Activity is modest and relatively flat — three awards in 2021, three in 2023, five in 2024, four in 2025, and seven in 2026 through mid-year. Recompete exposure in the next twenty-four months is light (one award worth $4.4 million reaching completion). Across SCI-reportable service contracts from FY2022 to FY2025, Shannon & Wilson appears only as a named subcontractor (8 records total), with roughly 1.9 FTEs in FY2024 and 0.5 FTEs in FY2025; the firm does not report as a prime on SCI-reportable federal service contracts above the $150,000 threshold, indicating that federal services revenue flows through task orders under its architect-engineer IDIQs rather than through standalone service contracts. As a subcontractor, Shannon & Wilson subcontracts to major engineering primes including HDR Engineering (seven sub awards spanning field investigations, LiDAR data collection, geotechnical engineering, and thermal testing), Burns & McDonnell Engineering Company, AECOM Technical Services, Reid Middleton, and Weston Solutions on environmental and geotechnical engineering assignments. The firm's own prime footprint is heavily concentrated on direct delivery rather than sub-tier engagement — 97% of awards are prime positions — reflecting its role as a specialist technical contractor to federal agencies rather than as a feeder to larger integration primes.
Quick answers
Is Shannon & Wilson Inc. registered in SAM.gov?
Yes. Shannon & Wilson Inc.'s SAM.gov registration is active through March 23, 2027.
How much has Shannon & Wilson Inc. received in federal contracts?
Federal contracts obligated $1,779,896 to Shannon & Wilson Inc. in fiscal year 2025 and $4,952,481 in fiscal years 2023 through 2027.
How does Shannon & Wilson Inc. rank among federal contractors?
Shannon & Wilson Inc. ranked #15 in NAICS 54136 and #33 in PSC Y1BC in FY2025.
What is Shannon & Wilson Inc.'s most recent federal award?
Shannon & Wilson Inc.'s most recent federal contract award is Howard a. Hanson DAM (hahd) fish passage facility (FPF) geotechnical engineering during construction (EDC) (W912DW26FA073), from ENDIST Seattle (USACE), on July 30, 2026.
On GovTribe
See Shannon & Wilson Inc.'s full federal record
- Federal contract awards
- IDV awards
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors