Every fact below carries a source link and an as-of date. Informational only. Ownership statements are limited to primary announcements and filings.
- Headquarters
- Seattle, Washington, per the firm's About pageSource: shannonwilson.com/about · As of 2026-10-06
- Founded
- 1954, by Bill Shannon and Stan WilsonSource: shannonwilson.com/about · As of 2026-10-06
- Ownership type
- Employee-owned: the firm describes itself as an employee-owned consulting firmSource: shannonwilson.com/about · As of 2026-10-06
- Employees
- More than 350 employeesSource: shannonwilson.com/about · As of 2026-10-06
- Website
- shannonwilson.comSource: shannonwilson.com · As of 2026-10-06
Legal name, DBA and former names
- Shannon & Wilson, Inc. (DOL Form 5500 sponsor name)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac… · As of 2025-10-15
Identifiers (UEI, state registrations)
- Texas TBPELS firm no. 3824.Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip · As of 2026-10-04
Offices
- 15 offices nationwide.Source: shannonwilson.com/about · As of 2026-10-06
Ownership type
- Employee-owned: the firm describes itself as an employee-owned consulting firm.Source: shannonwilson.com/about · As of 2026-10-06
Employee count or band
- More than 350 employees.Source: shannonwilson.com/about · As of 2026-10-06
Services and markets
- Integrated geotechnical engineering, geology and environmental consulting for infrastructure planning, design, permitting and construction.Source: shannonwilson.com/about · As of 2026-10-06
Leaders
- Gregory Fischer, President.Source: shannonwilson.com/people · As of 2026-10-06
- Russ Schwab, Board of Directors Chair and Chief Technology Officer.Source: shannonwilson.com/people · As of 2026-10-06
Licences (board records)
- Texas TBPELS roster lists SHANNON & WILSON INC (firm no. 3824, type NS, expires 2027-07-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip · As of 2026-10-04
Public filings
- DOL Form 5500 filings, plan year 2024: SHANNON & WILSON, INC. PS RETIREMENT & 401(K) PLAN AND TRUST (ACK_ID 20251015101012NAL0002219443001, 373 active participants); SHANNON & WILSON, INC. ELIGIBLE INDIVIDUAL ACCOUNT PLAN (ACK_ID 20251015100520NAL0005751392001, 373 active participants)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac… · As of 2025-10-15
Rankings and awards
- Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi… · As of 2026-10-05
Sources of record
- https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/public-disclosure/foia/form-5500-datasets
- https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
- https://www.shannonwilson.com/about
- https://www.shannonwilson.com/
- https://www.shannonwilson.com/people
- https://www.enr.com/toplists/2026-top-500-design-firms-3
Ownership tag: Employee-owned (ESOP). Profiles are informational, compiled from public sources linked above. Firms may request corrections. A listing is not an endorsement.
