What Fuss & O Neill does

Fuss & O'Neill is a privately held civil and environmental engineering consulting firm founded in 1923 (approaching its centennial) and headquartered in Manchester/Hartford, Connecticut. The firm employs 430+ professionals across 12 offices strategically located throughout New England (Connecticut, Massachusetts, New Hampshire, Vermont, Maine, Rhode Island). It operates as a multidisciplinary consultancy rather than a software product company, delivering integrated services across civil engineering, water and wastewater engineering, environmental engineering, facility engineering (MEPFP), landscape architecture, structural engineering, transportation and traffic engineering, climate resilience and sustainability, construction services/design-build, water and natural resources, and regulatory training. The firm also operates a dedicated subsidiary, Fuss & O'Neill Manufacturing Solutions, LLC, focused on occupational health, safety, and reliability engineering for industrial clients.

Fuss & O'Neill generates revenue through professional services fees billed on a project basis (time-and-materials, fixed-price, and qualifications-based contracts) to federal, state, and municipal government clients, as well as private developers, healthcare systems, higher education institutions, utilities, and manufacturers. Projects are secured primarily through competitive bidding, RFQ/RFP processes, and long-standing institutional relationships across New England. The firm is differentiated by its century-long operating history, deep regulatory familiarity across six New England state jurisdictions, dedicated emerging-contaminants expertise (PFAS/PFOA), in-house GIS capability, advanced wastewater treatment modeling using GPS-X and BIOWIN software, and a 12-office regional footprint that supports local client engagement. In 2024, the firm entered a strategic growth partnership with Trilon Group (a civil/environmental engineering holding platform), appointed a new CEO, acquired Onsite Engineering to expand its decentralized water/wastewater practice, opened a Vermont office, and formed the AMPED consortium to enter the cannabis cultivation facility vertical.

The business model is fundamentally a labor-based professional services model: revenue scales with billable headcount, utilization, and project mix, and is exposed to public-sector capital budget cycles and competitive procurement. Ownership is private with strategic affiliation under Trilon Group; no public financials are disclosed. Customer concentration is distributed across multiple verticals rather than dependent on a small number of anchor accounts, though the firm is regionally concentrated in the Northeast U.S. and does not claim a global footprint.

Name

Fuss & O Neill

Legal name

Fuss & O'Neill, Inc.

Website

https://fando.com

Company type

Private

Founded year

1923

Operating status

Operating

Headcount range

251–500 employees

Short description

Fuss & O'Neill is a privately held, 100-year-old civil and environmental engineering consultancy serving municipal, government, education, healthcare, industrial, and private development clients across New England from 12 offices with 430+ professionals, now operating as a strategic affiliate of Trilon Group.

Ownership category

akta.pro rank

Product category

Civil and Environmental Engineering Consulting Services

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (541330), Environmental Consulting Services (54162), Environmental Consulting Services (541620), Engineering Services (54133)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industries

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD), Industrial & Process Engineering Consulting (BPAHAIAF), Air Quality & Emissions Management (BPAHAJAI), EHS Auditing, Inspections & Assurance (BPAHAJAG), Waste & Hazardous Materials Management (incl. HazMat) (BPAHAJAK), Emergency Response, Spill Prevention & Crisis Preparedness (BPAHAJAM), Circularity Consulting & Program Management (EPR, Design-for-Circularity, LCA) (EUAIANAH)

Keywords

• Civil engineering consulting
• Environmental remediation services
• Water wastewater engineering
• Transportation infrastructure design
• Climate resilience advisory

Headquarters

HQ city

Manchester

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Engineering Consulting Services: Professional engineering services billed on a project basis for municipal, government, and private sector clients. Revenue generated through project fees, time-and-materials contracts, and fixed-price engagements for civil, environmental, structural, water/wastewater, and other engineering disciplines.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Fuss & O'Neill is a multidisciplinary civil and environmental engineering consulting firm providing integrated services across site planning, water and wastewater treatment, environmental remediation, structural engineering, transportation design, facility engineering, landscape architecture, climate resilience, and construction administration. The firm serves municipal, state, federal, industrial, energy, education, healthcare, and private development clients throughout New England with 430+ professionals across 12 offices. It operates a manufacturing-focused subsidiary (Fuss & O'Neill Manufacturing Solutions, LLC) and offers regulatory training programs.

Product overview

Fuss & O'Neill is an innovative civil and environmental engineering firm operating as a multidisciplinary consultancy with a portfolio of integrated service lines rather than a unified software product. The firm's offerings span eleven core service areas: Civil Engineering (site planning, surveying, utility infrastructure), Water and Wastewater Engineering (treatment, distribution, decentralized systems), Environmental Engineering (remediation, brownfields, hazardous materials), Facility Engineering (MEPFP, energy management), Landscape Architecture (parks, campus planning, streetscape), Structural Engineering (bridges, buildings, dams), Transportation and Traffic Engineering (complete streets, roundabouts), Resilience and Sustainability (climate adaptation, decarbonization), Construction Services and Design-Build, Water and Natural Resources (fish passage, watershed management), and Training. The firm operates a subsidiary, Fuss & O'Neill Manufacturing Solutions, LLC, focused on manufacturing safety and reliability services. The company recently expanded through the acquisition of Onsite Engineering (2024) to strengthen its decentralized water and wastewater capabilities.

Differentiator

Problem solved

Functional benefit

Brands

• Fuss & O'Neill Manufacturing Solutions, LLC: Dedicated team addressing manufacturing site needs, performance, and worker safety through maintenance and reliability experts.

Products and services

• Civil Engineering Civil engineering and site planning services for land development, site expansion, housing communities, retail, campus, healthcare, and entertainment venue projects, including site/civil engineering, stakeholder advocacy, public meeting representation, and comprehensive project lifecycle support.
• Water and Wastewater Engineering Water and wastewater engineering services including conveyance, treatment, and management solutions for municipal, state agency, private, and NGO clients, specializing in urban water supply utilities, nutrient impairments, biological and industrial wastewater treatment, decentralized systems, and water/wastewater facility design using GPS-X and BIOWIN modeling.
• Environmental Engineering Comprehensive environmental engineering services including air quality engineering, assessment and remediation, brownfields, emerging contaminants (PFAS, PFOA), hazardous building materials, and soil management for public and private clients needing regulatory compliance and environmental cleanup.
• Facility Engineering Facility engineering services including MEPFP (Mechanical, Electrical, Plumbing, Fire Protection), auditing and compliance, energy management, manufacturing services, and property condition assessments, addressing challenges from a holistic standpoint for manufacturers, municipalities, healthcare providers, and educational facilities.
• Landscape Architecture Landscape architecture services for parks, waterfronts, campuses, recreational spaces, memorials, and town centers, creating enduring designs supporting client visions while providing economic opportunities, improved accessibility, and climate change resilience.
• Structural Engineering Structural engineering for vertical structures (buildings, retaining walls, pump stations, dams, utility tunnels, agricultural facilities) and horizontal structures (bridges), providing due diligence, resilient design, and construction support throughout project lifecycles.
• Transportation and Traffic Engineering Transportation and traffic engineering promoting safe and efficient multimodal transportation, providing context-sensitive design solutions including complete streets, greenways, highway design, roundabout design, and traffic engineering for municipalities, developers, and state departments of transportation.
• Resilience and Sustainability Climate resilience and sustainability services helping communities and businesses adapt to changing environments, including adaptation design, climate vulnerability assessment, decarbonization, renewable energy, and nature-based solutions.
• Construction Services and Design-Build Construction services and design-build approach integrating technical and practical objectives, providing construction administration, demolition, facility buildouts, site infrastructure installations, and underground/aboveground storage tank services with turnkey design-build capabilities.
• Water and Natural Resources Water and natural resources engineering protecting, restoring, and maintaining vital water assets, including coastal resilience, dam engineering, fish passage, flood control, green stormwater infrastructure, and watershed management planning.
• Regulatory and Compliance Training Regulatory and compliance training programs covering underground storage tank operator training, RCRA hazardous waste, DOT hazardous materials, HAZWOPER, and manufacturing solutions, offered with CTDEEP approved trainer status for Class A/B UST Operators.
• Fuss & O'Neill Manufacturing Solutions Dedicated subsidiary providing manufacturing services including occupational health and safety, industrial hygiene, maintenance excellence, machine safeguarding, and reliability improvement programs for manufacturing facilities.

Quantifiable outcome

• Reduces cannabis cultivation facility build timelines from 24-30+ months to 12-18 months through AMPED integrated approach
• +1 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core and flagship.

• AMPED Consortium (ArchSolar, Accelerated Growth Solutions, AessenseGrows, Tecogen, Lead Funding, Real Lease)coreStrategic or Co-development Partner · 11 November 2025AMPED is a multidisciplinary collaboration of cannabis industry specialists showcasing an integrated approach to building cannabis cultivation facilities at MJBizCon 2025. The consortium offers a parallel workstream development model using factory-built, pre-sized components claiming to reduce build timelines from 24-30+ months to 12-18 months and achieve 40% lower energy costs.
• Trilon GroupflagshipStrategic or Co-development Partner · 1 January 2024Strategic growth partnership announced to accelerate firm growth. Trilon Group is a holding company/platform for civil and environmental engineering firms. The partnership positions Fuss & O'Neill for expanded capabilities and market reach while maintaining its brand and leadership.

Scale indicators4 records

Recent moves2 records

Expansion highlights6 records

Direct peers

• Tighe & Bond: Westwood, MA-based civil and environmental engineering consultancy serving New England municipalities, water utilities, and private developers. Highly comparable to Fuss & O'Neill in size, regional focus, and multidisciplinary service mix including water/wastewater, environmental, and civil engineering.
• Weston & Sampson: Massachusetts-headquartered engineering firm with comparable New England footprint offering water/wastewater, environmental, civil, and transportation services to municipal clients. Directly competes with Fuss & O'Neill in core Northeast municipal infrastructure markets.
• VHB: Watertown, MA-based engineering, planning, and design firm serving public and private clients across the Northeast with strong transportation, environmental, and land development practices. Comparable in regional focus, scale, and integrated multidisciplinary offerings.
• Haley & Aldrich: Burlington, MA-based environmental and geotechnical engineering consultancy with similar New England footprint. Closely comparable in environmental site assessment, brownfield redevelopment, and PFAS practice areas.

Broad incumbents

• GHD: Global engineering, architecture, and environmental consulting firm with substantial New England presence through acquisitions. Provides overlapping services in water, environmental, and civil engineering to municipal and private clients across the same geographies.
• Stantec: Global engineering and environmental services firm with significant Northeast US operations. Competes for larger municipal, environmental remediation, and water/wastewater projects in the same New England markets.
• Arcadis: Global design and consultancy with strong environmental and water practices serving municipal and industrial clients across the US. Competes for environmental remediation, climate resilience, and water infrastructure work in the Northeast.
• AECOM: Global infrastructure consulting firm with extensive Northeast operations. Competes for larger transportation, water, and environmental programs from state DOTs and major municipalities throughout New England.
• Jacobs: Global professional services firm with significant water, environmental, and transportation practices. Competes for major municipal infrastructure and climate resilience programs across the Northeast US.

Others

• Trilon Group: Parent platform and strategic partner of Fuss & O'Neill, aggregating civil and environmental engineering firms. Relevant as the holding entity that defines F&O's growth trajectory and eventual exit context rather than a direct competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/fandoinc
• Facebookfacebook.com/fandoinc

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Fuss & O Neill