Fuss & O'Neill Profile: Ownership, HQ and Public Records

Every fact below carries a source link and an as-of date. Informational only. Ownership statements are limited to primary announcements and filings.

Headquarters: ConnecticutSource: fando.com/about · As of 2026-10-06
Ownership type: Private equity backed: Trilon history states Fuss & O'Neill joined in December 2023; Trilon is backed by Alpine InvestorsSource: trilon.com · As of 2026-10-06
Sponsor or parent: Trilon.com history: Fuss & O'Neill joining in December 2023Source: trilon.com · As of 2026-10-06
Website: fando.comSource: fando.com/about · As of 2026-10-06

Legal name, DBA and former names

Fuss & O'Neill, Inc.Source: fando.com/about · As of 2026-10-06

Identifiers (UEI, state registrations)

SAM UEI LE5DAR1LLZK9 (as shown on the USAspending recipient record)Source: usaspending.gov/recipient/7a790cd7-a785-9a85-15… · As of 2026-10-06

Ownership type

Private equity backed: Trilon history states Fuss & O'Neill joined in December 2023; Trilon is backed by Alpine Investors.Source: trilon.com · As of 2026-10-06

Sponsor, parent or transaction

Trilon.com history: Fuss & O'Neill joining in December 2023.Source: trilon.com · As of 2026-10-06

Services and markets

Engineering consulting including transportation, water, resilience and related infrastructure.Source: fando.com/about · As of 2026-10-06

Leaders

Patrick Herold, Vice President of Operations.Source: fando.com/about/people · As of 2026-10-06
Aimee Couture, Vice President, Director of Marketing.Source: fando.com/about/people · As of 2026-10-06

Deals

December 2023: joined Trilon Group.Source: trilon.com · As of 2026-10-06

Federal awards (contracts)

USAspending recipient record FUSS & O'NEILL, INC (Hartford, CT), contract award obligations: FY2021 $5,897, FY2022 $0, FY2023 $0, FY2024 $23,794, FY2025 $0 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/7a790cd7-a785-9a85-15… · As of 2026-10-06

Public filings

DOL Form 5500 filings, plan year beginning 2024-01-01, NAICS 541330: FUSS & O'NEILL PROFIT SHARING & EMPLOYEE SAVINGS PLAN (ACK_ID 20250918150512NAL0001544561001, 0 active participants)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac… · As of 2025-09-18

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

Ownership tag: Private equity backed. Profiles are informational, compiled from public sources linked above. Firms may request corrections. A listing is not an endorsement.