American Environmental Group

What American Environmental Group does

Halliwell (doing business as American Environmental Group) is a global environmental science and forensic engineering consulting firm operating across APAC, North America, and EMEA. Core services include Phase I and II environmental site assessments, hazardous materials evaluation, forensic failure analysis spanning civil/structural, geotechnical, mechanical, and electrical engineering disciplines, fire science investigation, GIS-based forensic meteorology, building envelope consulting, and catastrophe (CAT) response. Adjacent offerings include expert witness and litigation support, industrial and occupational hygiene, and regulatory compliance services.

The firm serves a diversified client base led by insurance carriers requiring damage assessments, forensic analysis, and claims resolution support, with secondary demand from construction firms, government and public entities, industrial and manufacturing operators, and marine/cargo and food & beverage companies. Go-to-market is sales-led, executed through regional offices in Australia, Malaysia, New Zealand, and the United States. In the US, licensed professional engineering services are delivered through two distinct legal entities — Halliwell Engineering P.A. (licensed in California, Connecticut, Illinois, New York, and North Carolina) and Halliwell Engineering Associates, LLC (covering remaining states) — a structure that enables multi-jurisdictional practice. The firm segments its offerings across 24 industry verticals spanning aerospace, energy, healthcare, infrastructure, insurance, manufacturing, real estate, technology/telecom/data centers, and transportation. Revenue is generated through project-based professional services engagements; pricing mechanics, headcount, ownership, and financial backing are not disclosed in available data.

Name

American Environmental Group

Legal name

Halliwell

Website

https://americanenv.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

51–100 employees

Short description

Halliwell (American Environmental Group) is a global environmental science and forensic engineering consulting firm delivering damage assessments, hazardous materials evaluation, and expert witness services to insurance, construction, government, and industrial clients across APAC, North America, and EMEA.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (541620), Environmental Consulting Services (54162), Engineering Services (541330), Testing Laboratories and Services (54138)

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Site Assessment & Remediation (Phase I/II, Cleanup Oversight) (BPAHAJAC)

akta.pro secondary industries

Waste & Hazardous Materials Management (incl. HazMat) (BPAHAJAK), Occupational Health & Industrial Hygiene (BPAHAJAD), EHS Auditing, Inspections & Assurance (BPAHAJAG), Air Quality & Emissions Management (BPAHAJAI)

Keywords

• Environmental consulting
• Forensic engineering
• Property damage assessment
• Hazardous materials assessment
• Occupational hygiene

Headquarters

HQ city

Westlake Village

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Engineering and Environmental Consulting Services: Revenue generated through professional engineering and environmental consulting services including damage assessments, forensic analysis, environmental site assessments, occupational hygiene services, and expert witness testimony. Services are billed on a project basis for insurance, construction, industrial, and government clients requiring specialized technical expertise.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

American Environmental Group (Halliwell) provides professional engineering and environmental consulting services including property and environmental damage assessments, Phase I and II Environmental Site Assessment and Remediation Design, hazardous materials evaluations (mold, asbestos, chemical residuals), forensic engineering (Civil/Structural, Geotechnical, Mechanical, Electrical), forensic/fire science investigations, occupational hygiene and toxicology services, and expert witness and litigation support. Services are delivered by a multidisciplinary, certified, and licensed team to insurance companies, government entities, construction firms, and industrial organizations across APAC, North America, and EMEA.

Product overview

American Environmental Group (Halliwell) is a global environmental services and consulting firm offering a comprehensive portfolio of multidisciplinary expert services. The core offering centers on Environmental Science Services including damage assessments, hazardous materials evaluation, Phase I/II site assessments, and remediation design. Supporting services include Forensic Engineering (Civil/Structural, Geotechnical, Mechanical, Electrical), Forensic Architecture, Forensic/Fire Science Services, and CAT Response capabilities. Additional offerings span Building Design, Building Envelope, Code & Regulatory Compliance, Property Consulting, Quantity Surveying, Time Element & Delay Analysis, Project/Program Management, Passive Fire Advisory, and GIS/Forensic Meteorology. The company also provides Industrial/Occupational Hygiene and Toxicology Services, Expert Witness/Litigation Support, and Indoor Air Quality Assessment. These services serve diverse markets including insurance, construction, energy, healthcare, marine, and government sectors across APAC, North America, and EMEA regions.

Differentiator

Problem solved

Functional benefit

Products and services

• Environmental Science Services Multidisciplinary environmental consulting services including property/environmental damage assessments, smoke and fire damage assessment, food/product contaminant assessment, marine/cargo damage assessment, hazardous materials assessment, asbestos and mold causation and risk assessments, and Phase I and II Environmental Site Assessment and Remediation Design. Targeted at insurance, construction, government, and industrial clients.
• Forensic Engineering Services Comprehensive forensic engineering offerings including Civil/Structural Engineering, Geotechnical Engineering, Mechanical Engineering, and Electrical Engineering for origin and cause investigations and forensic failure analysis. Targeted at insurance, construction, and industrial clients.
• CAT Response Services Catastrophe response services providing rapid response for large-scale property damage events, including emergency planning and expert emergency response support across APAC, North America, and EMEA.
• Code & Regulatory Compliance Services Regulatory consulting and permitting services to ensure compliance with industry standards and regulations across multiple jurisdictions. Targeted at construction, government, industrial, and insurance clients.
• Forensic Architecture Services Forensic architecture services for structural failure analysis and expert investigation. Targeted at insurance, construction, and legal clients.
• Forensic/Fire Science Services Fire science investigation services for origin and cause determination. Targeted at insurance carriers, legal counsel, and industrial clients.
• GIS/Forensic Meteorology Services Geographic Information System analysis and forensic meteorology services for weather-related loss investigation. Targeted at insurance carriers and legal clients.
• Passive Fire Advisory Services Expert advisory services for passive fire protection systems. Targeted at construction, building envelope, and insurance clients.
• Project/Program Management Services Project and program management services for coordinated execution of complex assignments across multiple disciplines. Targeted at insurance, construction, and industrial clients.
• Property Consulting Services Property consulting services for loss assessment and risk evaluation. Targeted at insurance carriers and real estate clients.
• Quantity Surveying Services Quantity surveying services for construction cost estimation and project assessment. Targeted at construction and insurance clients.
• Time Element & Delay Analysis Services Time element and delay analysis services for construction and project timeline evaluation. Targeted at construction, insurance, and legal clients.
• Building Design Services Expert building design consultation services as part of the multidisciplinary expertise offerings. Targeted at construction and property developer clients.
• Building Envelope Services Building envelope assessment and consulting services for structural integrity evaluation. Targeted at construction, insurance, and real estate clients.
• Industrial/Occupational Hygiene and Toxicology Services Industrial and occupational hygiene services including hazard identification, risk assessments, and toxicology evaluation for workplace safety. Targeted at industrial, manufacturing, and government clients.
• Expert Witness and Litigation Support Services Expert witness and litigation support services including technical advice, testimony, and independent determination of Fair and Reasonable works. Targeted at insurance carriers, legal counsel, and government clients.
• Indoor Air Quality Assessment Services Indoor air quality assessment services for environmental health evaluation. Targeted at insurance, real estate, construction, and government clients.
• Soil and Groundwater Fate and Transport Services Environmental fate and transport analysis for soil and groundwater contamination assessment. Targeted at government, industrial, and remediation clients.
• Construction Services Construction-related expert services spanning defect investigation, building envelope, and project management. Targeted at construction firms, developers, and insurance clients.

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Direct peers

• Tetra Tech: Tetra Tech is a leading global consulting and engineering firm focused on water, environment, and sustainable infrastructure. Like Halliwell, it provides environmental site assessments, hazardous materials services, and multi-disciplinary engineering consulting to insurance, government, and industrial clients.
• Arcadis: Arcadis is a global design and consultancy firm with deep environmental, water, and building practices. It competes directly with Halliwell on environmental site assessment, remediation design, and industrial environmental services for corporate and insurance clients.
• ERM (Environmental Resources Management): ERM is the world's largest pure-play environmental, health, safety, and sustainability consultancy. Its EHS consulting, site investigation, and risk management practices closely parallel Halliwell's environmental science and occupational hygiene offerings.
• SLR Consulting: SLR is a global environmental and advisory consultancy offering site assessment, remediation, environmental compliance, and built-environment services. Its mix of environmental and engineering advisory is highly comparable to Halliwell's integrated environmental/forensic model.
• GHD: GHD is a global engineering, architecture, and environmental consulting firm with strong presence in Australia, New Zealand, and North America — directly mirroring Halliwell's APAC/NA footprint. Its environmental and property/forensic practices closely parallel Halliwell's service mix.
• Haley & Aldrich: Haley & Aldrich is a US-focused environmental and geotechnical engineering consultancy providing site assessment, remediation, and building/facility services. Its geotechnical + environmental mix and insurance-sector exposure make it a close comparable to Halliwell's forensic engineering practice.

Broad incumbents

• AECOM: AECOM is a global infrastructure consulting firm with large environment, water, and engineering practices. It offers overlapping environmental consulting and forensic-style engineering services as part of a much broader portfolio across transportation, water, and government infrastructure.
• Jacobs: Jacobs is a global professional services firm with significant environmental, water, and engineering capabilities serving government, industrial, and infrastructure clients. Its Critical Mission Solutions and PA Consulting-adjacent practices overlap with Halliwell's regulatory and forensic engineering work.
• WSP: WSP is a global engineering consultancy, including through its Golder acquisition, with strong environment, ground engineering, and property advisory practices. Its environmental and earth sciences services compete directly with Halliwell in site assessment and remediation.

Emerging players

• Trinity Consultants: Trinity Consultants specializes in EHS regulatory compliance, air quality, and safety services. While narrower than Halliwell in forensic engineering, it competes on the environmental compliance, air quality, and industrial hygiene pieces of Halliwell's portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/american-environmental-group

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about American Environmental Group