Top Environmental Consulting Firms (2026)

Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: May 12, 2026

 

The top environmental consulting firms are AECOM, Tetra Tech, Jacobs, WSP, and ERM. These firms lead a global market that reached $54.7 billion in 2023, according to Environment Analyst, and is forecast to hit $82.8 billion by 2028.

 

Whether you are exploring environmental consulting as a career or researching firms for a specific project, this guide covers the top firms, what they do, how much they pay, and how to break into the field. Having coached thousands of candidates into consulting roles during my time at Bain, I can tell you that environmental consulting is one of the fastest growing specializations in the industry.

 

But first, a quick heads up:

 

McKinsey, BCG, Bain, and other top firms accept less than 1% of applicants every year. If you want to triple your chances of landing interviews and 8x your chances of passing them, watch my free 40-minute training.

 

What Are the Top Environmental Consulting Firms?

 

The top environmental consulting firms are large, technically specialized companies that help clients manage regulatory compliance, site remediation, sustainability strategy, and climate resilience. According to Environment Analyst's 2025 Global Market Assessment, the five largest firms by environmental and sustainability consulting revenue are Jacobs, Tetra Tech, AECOM, WSP, and Stantec.

 

Together, these five firms held 51% of the U.S. environmental consulting market share in 2023 and earned a combined $11.3 billion in environmental and sustainability revenue, growing 19% year over year. Below is a detailed look at the leading firms shaping this industry.

 

Firm

HQ

Revenue

Employees

Key Specialties

AECOM

Dallas, TX

$16.1B

52,000+

Impact assessments, PFAS remediation, climate resilience

Tetra Tech

Pasadena, CA

$4.2B

28,000+

Water resources, ESG consulting, site remediation

Jacobs

Dallas, TX

$16B

60,000+

Climate response, sustainability, infrastructure

WSP

Montreal, CA

$9.8B

67,000+

Climate change, contaminated sites, EHS

ERM

London, UK

$3.6B

8,500+

ESG advisory, due diligence, risk management

Stantec

Edmonton, CA

$5.2B

31,000+

Impact assessment, water, waste management

Arcadis

Amsterdam, NL

$4.8B

36,000+

Remediation, resilience, circular economy

Ramboll

Copenhagen, DK

$2.4B

18,000+

Health sciences, water, climate adaptation

ICF

Reston, VA

$2.1B

9,000+

Environmental strategy, data analytics, program mgmt

TRC Companies

Windsor, CT

$900M+

7,000+

Compliance, emergency planning, remediation

Trinity Consultants

Dallas, TX

$500M+

2,000+

Air quality, regulatory compliance, EHS technology

SWCA

Phoenix, AZ

$300M+

1,800+

Cultural resources, NEPA, ecological surveys

 

For a broader view of how these firms fit into the overall consulting landscape, see our guide to the most prestigious consulting firms.

 

What Services Do Environmental Consulting Firms Provide?

 

Environmental consulting firms provide technical, regulatory, and strategic services that help organizations meet environmental obligations and reduce ecological risk. According to Mordor Intelligence, environmental impact assessments alone accounted for 30.25% of all environmental consulting revenue in 2025.

 

The most common services include:

 

  • Environmental Impact Assessments (EIA): Evaluating the ecological effects of proposed projects before construction or development begins

 

  • Site Remediation: Cleaning up contaminated land and groundwater, including emerging contaminants like per- and polyfluoroalkyl substances (PFAS)

 

  • Regulatory Compliance: Helping clients meet federal, state, and local environmental regulations such as the National Environmental Policy Act (NEPA) and Clean Air Act

 

  • ESG and Sustainability Consulting: Advising on environmental, social, and governance reporting, carbon accounting, and net zero strategy

 

  • Water and Wastewater Management: Designing systems for water treatment, stormwater management, and compliance with the EPA Lead and Copper Rule

 

  • Climate Change and Resilience Planning: Modeling climate risks, designing adaptation strategies, and supporting decarbonization efforts

 

  • Renewable Energy Consulting: Permitting, siting, and environmental review for solar, wind, and battery storage projects

 

  • Air Quality Management: Monitoring emissions, obtaining permits, and ensuring compliance with Clean Air Act standards

 

Energy and power clients made up 29.1% of market demand in 2025, according to Mordor Intelligence, followed by construction, manufacturing, and government agencies. To learn more about the different types of consulting, check out our guide to consulting specializations.

 

Do MBB and Big Four Firms Do Environmental Consulting?

 

Yes, but their approach is fundamentally different from pure environmental consulting firms. McKinsey, BCG, and Bain focus on high level sustainability strategy, ESG transformation, and climate policy advisory rather than technical fieldwork like site remediation or air quality monitoring.

 

McKinsey launched its Sustainability Academy in 2022 to help clients work toward net zero emissions. BCG has a dedicated Climate and Sustainability practice that advises companies on decarbonization pathways. Bain supports clients on energy transition strategy and ESG integration into corporate operations.

 

The Big Four consulting firms also operate in this space. Deloitte, EY, PwC, and KPMG each have environmental advisory teams that focus on ESG reporting, climate risk disclosure, and regulatory compliance consulting.

 

 

MBB / Big Four

Pure Environmental Firms

Focus

Strategy, ESG advisory, policy

Technical, field-based, regulatory

Typical Projects

Net zero roadmaps, ESG reporting, M&A due diligence

Site remediation, EIA, air permits, water treatment

Client Contact

C-suite and board level

Operations, EHS, and project managers

Entry Requirements

MBA or top undergrad, case interviews

Environmental science/engineering degree

Entry Salary

$100K to $190K+

$55K to $75K

 

In my experience at Bain, environmental and sustainability cases are becoming more common in interviews. If you are targeting a sustainability role at an MBB firm, strong case interview skills are essential. My case interview course can help you master the frameworks and problem solving techniques these firms test for.

 

How Much Do Environmental Consultants Make?

 

The average salary for an environmental consultant in the United States is approximately $115,000 per year, according to Glassdoor data from 2026. However, pay varies significantly depending on experience, location, and specialization. Entry level environmental consultants typically earn between $55,000 and $75,000, while senior professionals and directors can exceed $150,000.

 

Experience Level

Base Salary Range

Total Compensation

Typical Titles

Entry Level (0-2 yrs)

$55,000 - $75,000

$55,000 - $80,000

Staff Consultant, Analyst

Mid Level (3-7 yrs)

$75,000 - $110,000

$80,000 - $120,000

Sr. Consultant, Project Mgr

Senior (8-15 yrs)

$110,000 - $150,000

$120,000 - $170,000

Associate Director, Principal

Director / VP (15+ yrs)

$150,000 - $200,000+

$170,000 - $250,000+

Director, VP, Practice Lead

 

Location makes a meaningful difference. According to Glassdoor, environmental consultants in Seattle earn an average of $129,000, compared to $119,000 in Los Angeles, $111,000 in New York City, and $109,000 in Houston. Higher cost of living cities generally pay more, but the gap has narrowed as remote work has become more common.

 

What Are the Highest Paid Environmental Consulting Jobs?

 

The highest paid roles in environmental consulting combine technical expertise with strategic leadership. Sustainability directors overseeing ESG strategy at large corporations can earn $150,000 to $200,000 or more. ESG consultants at MBB or Big Four firms typically earn $130,000 to $200,000+, reflecting the premium these firms pay for strategic advisory work.

 

Renewable energy project managers leading solar and wind permitting earn $120,000 to $160,000 at top environmental firms. PFAS remediation specialists are also commanding premium pay, given the billions in cleanup projects being driven by new EPA regulations. For comparison, the consulting career path guide shows how management consulting salaries compare at each level.

 

What Is Driving Demand for Environmental Consultants?

 

Demand for environmental consultants is growing faster than average across the consulting industry, driven by four major forces. According to Environment Analyst, the global market will need 126,000 additional consulting professionals to meet projected demand through 2028.

 

Tightening Regulations and ESG Mandates

 

The EU Corporate Sustainability Reporting Directive (CSRD) now requires approximately 50,000 companies to disclose detailed environmental data. In the United States, state level climate disclosure bills are expanding advisory pipelines. These mandatory reporting requirements are shifting environmental consulting from project based work to continuous engagement, creating recurring revenue streams for firms.

 

PFAS and Emerging Contaminant Remediation

 

PFAS contamination has become one of the largest drivers of environmental consulting work. The EPA's final PFAS regulations are creating billions of dollars in remediation projects across water systems, military bases, and industrial sites. Firms like AECOM and Tetra Tech have built dedicated PFAS practices to capture this growing demand.

 

Infrastructure Investment and Climate Resilience

 

Federal infrastructure spending continues to generate long cycle environmental consulting projects focused on climate resilience, water system upgrades, and grid modernization. According to Mordor Intelligence, North America held 35.5% of global environmental consulting market share in 2025, largely driven by these infrastructure programs.

 

Energy Transition and Renewable Energy Expansion

 

The accelerating build out of solar, wind, and battery storage projects requires extensive environmental permitting, impact assessments, and habitat studies. Environmental consultants play a critical role in navigating the complex regulatory requirements that renewable energy developers must clear before construction.

 

How Do You Break into Environmental Consulting?

 

Breaking into environmental consulting depends on whether you are targeting a pure environmental firm or a sustainability role at an MBB or Big Four firm. The paths are quite different in terms of education, interview preparation, and day to day work.

 

What Degree Do You Need for Environmental Consulting?

 

For pure environmental consulting firms like AECOM, Tetra Tech, or ERM, the most common educational backgrounds are:

 

  • Environmental Science or Environmental Studies: The most direct path into technical environmental consulting roles

 

  • Civil or Environmental Engineering: Opens doors to remediation, water resources, and infrastructure projects. A Professional Engineer (PE) license significantly boosts earning potential

 

  • Geology or Hydrogeology: Valued for contaminated site work, groundwater assessment, and mining sector consulting

 

  • Environmental Policy or Public Administration: Strong fit for regulatory compliance and government advisory roles

 

  • MBA with Environmental Focus: Best for those targeting leadership roles or sustainability strategy positions at larger firms

 

For MBB or Big Four sustainability practices, the typical path involves a top undergraduate degree or MBA, combined with strong case interview performance. The interview process is identical to general management consulting. If you are an engineer considering this path, our engineering to consulting guide covers the transition step by step.

 

What Certifications Help in Environmental Consulting?

 

Several professional certifications can accelerate your career in environmental consulting:

 

  • Professional Engineer (PE): Required for signing off on engineering designs and reports. One of the most impactful credentials for career advancement

 

  • LEED Accreditation: Demonstrates expertise in green building practices. Increasingly valued as sustainable construction demand grows

 

  • Certified Environmental Professional (CEP): Recognized credential for mid career environmental professionals

 

  • Certified Hazardous Materials Manager (CHMM): Valuable for roles focused on hazardous waste management and remediation

 

  • ISO 14001 Lead Auditor: Useful for environmental management system consulting, particularly with multinational clients

 

For a detailed look at how to prepare for any consulting career, including resume strategy and interview prep, see our comprehensive how to get into consulting guide.

 

What Is the Difference Between Environmental Consulting and Sustainability Consulting?

 

Environmental consulting and sustainability consulting overlap but are not the same thing. Environmental consulting focuses primarily on regulatory compliance, site specific assessments, and technical fieldwork. Sustainability consulting takes a broader strategic view, advising companies on ESG frameworks, carbon reduction targets, and long term value creation.

 

Dimension

Environmental Consulting

Sustainability Consulting

Primary Focus

Regulatory compliance, site remediation, permits

ESG strategy, carbon accounting, net zero roadmaps

Key Deliverables

EIA reports, compliance audits, remediation plans

Sustainability reports, ESG disclosures, strategy decks

Typical Firms

AECOM, Tetra Tech, ERM, Ramboll

McKinsey, BCG, EY, Deloitte

Background Needed

Environmental science, engineering

MBA, business, policy

Fieldwork Required?

Often yes (site visits, sampling)

Rarely (office and client-site based)

 

The lines are blurring. Large environmental firms like ERM and Arcadis have expanded into ESG advisory, while MBB firms are increasingly hiring candidates with environmental science backgrounds for their sustainability practices. Many firms now refer to their work as "environmental and sustainability consulting" to reflect this convergence.

 

If you are interested in the many different specializations within consulting, our types of consulting guide provides a complete overview. You can also explore boutique consulting firms that specialize in environmental niches.

 

Frequently Asked Questions

 

Is Environmental Consulting a Good Career?

 

Yes. Environmental consulting offers strong job security, meaningful work, and growing demand. The U.S. environmental consulting market is valued at $27.4 billion in 2026, according to IBISWorld, with steady long term growth driven by tightening regulations and climate adaptation needs. Professionals with 10+ years of experience routinely earn six figure salaries.

 

What Is the Highest Paid Environmental Consulting Job?

 

Sustainability directors and ESG consultants at major firms earn the highest salaries, often exceeding $150,000 to $200,000 per year. Environmental consultants who work at MBB or Big Four firms on sustainability strategy can earn even more. At the technical level, PFAS remediation specialists and renewable energy project managers command premium pay due to specialized demand.

 

Do You Need a Master's Degree for Environmental Consulting?

 

Not always. Many entry level positions at environmental consulting firms accept candidates with a bachelor's degree in environmental science, engineering, or a related field. However, a master's degree or MBA can accelerate career advancement and is often preferred for senior or strategy focused roles. A Professional Engineer license can be equally or more valuable than a graduate degree for technical career tracks.

 

What Are the Disadvantages of Being an Environmental Consultant?

 

The main challenges include frequent travel, tight regulatory deadlines, and the pressure of managing multiple client projects simultaneously. Fieldwork can require long hours outdoors in difficult conditions. Entry level salaries at pure environmental firms ($55,000 to $75,000) are lower than what MBB or Big Four firms pay. Career progression can also be slower at smaller firms compared to the structured promotion timelines in management consulting.

 

Which Environmental Consulting Firms Are Best to Work For?

 

Among large firms, ERM, Ramboll, and SWCA are consistently rated well by employees for culture and work life balance. Trinity Consultants has been recognized as a Culture Champion and ranked among the top 100 companies for diversity and inclusion. Among publicly traded firms, Tetra Tech and Jacobs offer strong benefits, global project variety, and clear career paths. The best firm for you depends on whether you prioritize salary, specialization, location, or culture.

 

Everything You Need to Land a Consulting Offer

 

Need help passing your interviews?

  • Case Interview Course: Become a top 10% case interview candidate in 7 days while saving yourself 100+ hours

  • Fit Interview Course: Master 98% of consulting fit interview questions in a few hours

  • Interview Coaching: Accelerate your prep with 1-on-1 coaching with Taylor Warfield, former Bain interviewer and best-selling author

  

Need help landing interviews?

 

Need help with everything?

 

Not sure where to start?