Every fact below links to its source. Informational only. Ownership statements are limited to primary announcements and filings.
- Headquarters
- Walnut Creek, California, as listed by ENR in the 2026 Top 500 Design Firms; the USAspending recipient record also shows Walnut CreekSource: enr.com/toplists/2026-top-500-design-fi…
- Founded
- 1933Source: carollo.com/about
- Website
- carollo.comSource: carollo.com
- Ownership type
- Ownership not published
Legal name, DBA and former names
- Carollo Engineers, Inc. (Texas board record and USAspending recipient record)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
Identifiers (UEI, state registrations)
- SAM UEI C7HVTLQZSWN4 (as shown on the USAspending recipient record) and Texas TBPELS firm no. 882.Source: usaspending.gov/recipient/95efdaf6-f6f0-44b7-0a…
Services and markets
- Environmental engineering firm specializing in the planning, design and construction of water and wastewater facilities.Source: carollo.com/about
Leaders
- B. Narayanan, President, CEO and Chairman of the Board.Source: carollo.com/about/board-of-directors
- Michelle Cannon, Executive Vice President, Managing Director of People.Source: carollo.com/about/board-of-directors
- Troy Hedlund, Executive Vice President, Managing Director of Internal Operations.Source: carollo.com/about/board-of-directors
Licences (board records)
- Texas TBPELS roster lists Carollo Engineers, Inc. (firm no. 882, type NS, expires 2028-01-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
Federal awards (contracts)
- USAspending recipient record CAROLLO ENGINEERS INC (Walnut Creek, CA), contract award obligations: FY2021 $0, FY2022 $0, FY2023 $0, FY2024 $1,767,266, FY2025 $0 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/95efdaf6-f6f0-44b7-0a…
Public filings
- DOL Form 5500 filings, plan year beginning 2024-01-01, NAICS 541330: CAROLLO ENGINEERS, INC. 401(K) PROFIT SHARING PLAN (ACK_ID 20250924125436NAL0008682368001, 1,519 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…
News timeline
- 2026-09-22: Tina Houston joined the firm's Atlanta office.Source: carollo.com/news/tina-houston
Sources of record
- https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
- https://www.usaspending.gov/recipient/95efdaf6-f6f0-44b7-0a38-367d648e8fee-P/latest
- https://www.enr.com/toplists/2026-top-500-design-firms-1
- https://carollo.com/about/
- https://carollo.com/
- https://carollo.com/about/board-of-directors/
- https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/public-disclosure/foia/form-5500-datasets
- https://carollo.com/news/tina-houston/
Ownership tag: Ownership not published. Profiles are informational, compiled from public sources linked above. Firms may request corrections. A listing is not an endorsement.
