Every fact below links to its source. Informational only. Ownership statements are limited to primary announcements and filings.
- Headquarters
- Reading, Mass., as listed by ENR in the 2026 Top 500 Design FirmsSource: enr.com/toplists/2026-top-500-design-fi…
- Founded
- 1899Source: westonandsampson.com/about
- Ownership type
- Employee-owned (ESOP), as described on the firm's own websiteSource: westonandsampson.com/about
- Employees
- More than 1,000 professionals, per the firm's siteSource: westonandsampson.com/about/people
- Website
- westonandsampson.comSource: westonandsampson.com
Legal name, DBA and former names
- Weston & Sampson.Source: westonandsampson.com/about
Identifiers (UEI, state registrations)
- SAM UEI UERUKNFQN3D5 (as shown on the USAspending recipient record) and Texas TBPELS firm no. 19579.Source: usaspending.gov/recipient/ad526cfc-3a57-88c2-10…
Offices
- The firm has offices along the East Coast, from Massachusetts to Florida.Source: westonandsampson.com/about
Ownership type
- Employee-owned (ESOP), as described on the firm's own website.Source: westonandsampson.com/about
Employee count or band
- More than 1,000 professionals, per the firm's site.Source: westonandsampson.com/about/people
Services and markets
- The firm provides planning, design, engineering, construction, operations and maintenance, and environmental services to communities and utilities.Source: westonandsampson.com
Leaders
- Frank Ricciardi, CEO.Source: westonandsampson.com/about/people
- Leah Stanton, COO.Source: westonandsampson.com/about/people
Licences (board records)
- Texas TBPELS roster lists Weston & Sampson Engineers, Inc. (firm no. 19579, type NS, expires 2027-07-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
Federal awards (contracts)
- USAspending recipient record WESTON & SAMPSON ENGINEERS, INC. (Reading, MA), contract award obligations: FY2021 $0, FY2022 $0, FY2023 $0, FY2024 $18,191,554, FY2025 $10,693,394 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/ad526cfc-3a57-88c2-10…
ESOP plan data (Form 5500)
- DOL Form 5500 plan year beginning 2024-01-01: WESTON & SAMPSON, INC. EMPLOYEE STOCK OWNERSHIP PLAN (ACK_ID 20251013105759NAL0000514387001), 727 active participants and total plan assets of $52,845,386 at year end.Source: dol.gov/agencies/ebsa/about-ebsa/our-ac…
Public filings
- DOL Form 5500 filings, plan year beginning 2024-01-01, NAICS 541330: WESTON & SAMPSON, INC. EMPLOYEE STOCK OWNERSHIP PLAN (ACK_ID 20251013105759NAL0000514387001, 727 active participants); WESTON & SAMPSON 401(K) AND PROFIT SHARING PLAN (ACK_ID 20251014090743NAL0002377729001, 923 active participants)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac…
Rankings and awards
- Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi…
Sources of record
- https://www.westonandsampson.com/about
- https://www.usaspending.gov/recipient/ad526cfc-3a57-88c2-101b-9e08e00b3828-P/latest
- https://www.enr.com/toplists/2026-top-500-design-firms-2
- https://www.westonandsampson.com/
- https://www.westonandsampson.com/about/people
- https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
- https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/public-disclosure/foia/form-5500-datasets
Ownership tag: Employee-owned (ESOP). Profiles are informational, compiled from public sources linked above. Firms may request corrections. A listing is not an endorsement.
