REPORT INTRODUCTION
Environment Analyst’s comprehensive rankings of the Top 100 Global Environmental & Sustainability (E&S) Consultancy Firms is out now.
Compiled through rigorous research of, and engagement with, the leading firms, this unique dataset ranks the Top 100 global firms in terms of E&S consulting revenue (from FY 2022).
If you are not a member, please visit our website or contact us to enquire about accessing the report.
TOP 100 GLOBAL ENVIRONMENTAL & CONSULTANCY FIRMS
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AECOM
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WSP
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Jacobs
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Tetra Tech, Inc.
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Stantec
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Arcadis
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ERM (Environmental Resources Management)
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Ramboll
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HDR
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RSK
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Accenture
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Sweco
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GHD
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Ernst Young
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SLR
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ICF
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AFRY
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Antea Group
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Brown and Caldwell
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Mott Macdonald
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NV5
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Terracon Consultants Inc.
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McKinsey
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Royal HaskoningDHV
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GeoSyntec Consultants
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Parsons
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SNC-Lavalin Group/AtkinsRéalis
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Worley Consulting
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Apex Companies, LLC
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Montrose Environmental
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Leidos
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Woodard & Curran
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TRC Companies Inc.
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Trinity Consultants
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SCS Engineers
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Hazen & Sawyer
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SWCA
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Kleinfelder
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Willdan Group Inc.
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CDM Smith
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Inogen Alliance
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Boston Consulting Group
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Deloitte
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PwC
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EA Engineering Science and Technology
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North Wind Group
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langan
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Haley & Aldrich
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Atlas Technical Consultants
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TAUW
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Egis group
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ILF Consulting Engineers
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ESA (Environmental Science Associates)
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Arup
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KPMG
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KBR
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Roux Associates
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HGL (HydroGeologic)
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Bain & Company
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Aurecon
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Michael Baker International
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Anthesis
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Carollo Engineers
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Multiconsult ASA
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Anchor QEA
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Fluor Corpoation
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SMEC
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Partner Engineering & Science
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Deltares
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Burns & Mcdonnell
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Ricardo
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LJA Engineering & Surveying Inc.
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Weston & Sampson
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Dudek
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Witteveen+Bos
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The Cadmus Group
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EcoAct
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Artelia
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Barr Engineering
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GZA
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DHI
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Trihydro Corp
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EBI Consulting
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IDOM
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Civil & Environmental Consultants, Inc.
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Kennedy Jenks
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Dewberry
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GES
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SGS
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Navarro Research and Engineering, Inc.
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EnSafe
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AKRF
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BGE
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JBA Consulting Group
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COWI
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Lucion Group
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D&B Engineers and Architects
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Foth
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Huntington Ingalls
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KCI Inc.
The 100 firms represent $34.8bn in E&S consulting revenues in 2022, up double digits from 2021. E&S consulting revenues grew at a faster rate than group revenue. This was driven by elevated demand for sustainability and ESG services, encompassed by an industry-wide growing priority, in addition to strong regulatory changes in response to the global climate crisis. The shift across a range of stakeholders to move from sustainability reporting to sustainability operationalization across business activities is also driving this revenue growth.
New additions to the list this year include Haley & Aldrich and EcoAct. Companies that no longer feature in the list due to acquisitions are RPS (now part of Tetra Tech), Cardno (now part of Stantec) and Wood E&I (now part of WSP).
Companies that have risen in the ranks from this previous list to this year’s list include Worley Consulting, SLR and Trinity Consultants.
HEADLINE FINDINGS

WHY DO YOU NEED THE REPORT?
Discover the firms who are leading in embedding sustainability
Benchmark yourself against competitors
Inform your business and investment decisions with our independent dataset
GLOBAL MARKET INTELLIGENCE LIBRARY
We collaborate with environmental and sustainability consultancies worldwide to produce unique reports, datasets and profiles, highlighting the leading players and regional, service and client sector dynamics influencing the sector
The report and accompanying Excel data pack offers a unique window on the E&S consulting market dynamics, and includes:
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Executive summary of the market
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Industry rankings tables
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Benchmark data and KPIs (including year-on-year growth, average contract value, revenue per head and profitability)
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Revenue breakdowns by company, region, service area and client sector (for the latest FY2022 year and a decade of historic data)
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Industry M&A transaction & structure analysis
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Forecast market growth by region, client sector and service area to 2027
Global Environmental & Sustainability Consulting Strategies and Market Assessment
Global Competitor Analysis Profile Series
These data-rich profiles have been compiled through rigorous research and engagement with the profiled firms and are updated for the latest financial year figures and KPIs (for FY2022). They include:
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Our unique strategic assessment
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M&A details and independent SWOT analysis
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Revenue totals/growth and staff details over time at group level and for the firms’ E&S consulting activities – which are evaluated by geographic location, service area and client sector
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Full appraisal of their U.S. business (where relevant)
ESG Strategies: Accelerating Impact and Net Zero Goals in Consultancy
We assess how 50 leading global environmental & sustainability consulting firms are reporting and acting on the climate and ESG imperative, to help you make sense of the claims and pledges being made. The report includes:
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Detailed company profiles assessing 50 firms' ESG progress using our unique, stakeholder perception analysis and sector-specific ratings system
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Introduction and recommendations
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Consultants and the climate disclosure landscape
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Net zero heroes: divergent pathways and progress
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ESG impact: beyond emissions
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Methodology