How to Choose the Right ESG Consultant for Your Business (2026 Guide)

Municipal city managers are under real pressure to act on sustainability while keeping budgets in check. A solid environmental, social and governance (ESG) strategy is no longer a nice-to-have for communities planning ahead. The consulting partner a city chooses will shape whether its sustainability program actually gains ground or stalls out.

What Does an ESG Consultant Do?

An ESG consultant looks at how an organization affects the environment, treats its people and runs its governance, then builds a plan to do better. On the community level, that can mean tracking carbon emissions, testing water quality, auditing social equity programs or sorting out regulatory compliance. The global ESG consulting market reached an estimated $10.8 billion in 2024 and is projected to grow at about 13% per year through 2032.

City managers working with an ESG specialist should expect more than a report collecting dust on a shelf. A typical engagement includes analyzing current data, running stakeholder meetings, providing regulatory guidance and managing a program over time. According to a Deloitte survey of 435 U.S. public sector sustainability leaders, respondents named decarbonization, climate resilience, workforce equity and environmental justice as top priorities.

Knowing what a consultant delivers day to day makes it easier to spot the right one. The following steps cover how to define community goals, what qualities to look for, how to vet candidates and how to make the final call. Here’s how to choose the right ESG consultant for your business.

Step 1: Determine the Community’s ESG Goals

Before talking to any consulting firm, city managers should be clear on what success actually looks like for their community. Knowing the priorities up-front makes conversations with potential partners more focused and keeps a request for proposal on track.

Assess the Starting Point

Pull together baseline numbers on energy use, waste output, water consumption and social impact. This information shows where a community stands today and where the biggest gains are possible. Many communities already have much of this data through utility billing and public works records.

Engage Key Stakeholders

Bring in community members, department heads, elected officials and local advocacy groups early. Getting people aligned on sustainability priorities from the start prevents disagreements down the road. Stakeholder insight also builds public support, which matters for programs that require spending or changes in routine or behavior.

Prioritize Objectives

Determine the most pressing ESG issues for the community. One city may need to cut its carbon footprint, while another might focus on water quality or social equity. Ranking these priorities makes it easier to find a consulting partner whose strengths line up with what the community needs.

Step 2: Identify the Key Qualities of a Top Consultant

With goals set, city managers can start measuring firms against real criteria. The right consultant brings subject-matter expertise, public-sector experience, full project capability and current technology.

Deep Technical and Regulatory Expertise

The firm’s team should include certified and tested practitioners, such as industrial hygienists and licensed engineers who understand the science and rules behind sustainability. Communities deal with different regulations from private companies, so a firm’s practitioners need to know federal, state and local compliance inside and out.

Experience with Community-Scale Programs

Corporate ESG work and public-sector sustainability operate under different conditions. A strong consulting partner knows how to create and manage programs for agencies and utilities that serve entire communities. Seek out specialists who have run energy efficiency programs or supported infrastructure upgrades across multiple jurisdictions.

End-to-End Project Support

A consultant who stays with a project from initial concept through in-service assets and consistent monitoring provides a community with continuity and peace of mind. Splitting work between firms often leads to gaps in accountability and lost knowledge between phases. Prioritize firms with a record of managing the full project lifespan.

Proficiency with Modern Technology

Good data collection, analysis and comprehensive testing all require current software and equipment. A firm’s ability to use geographic information systems, energy modeling tools and real-time monitoring affects the quality of what it delivers.

Step 3: Research and Vet Potential ESG Partners

Once city managers know what they are looking for, the search can start in earnest. Read sustainability-focused industry publications, attend relevant conferences and ask peer city managers who they have worked with.

Cross-reference a firm’s claims with independent case studies and actual project outcomes. A firm that has worked with communities of a similar size and scope is a stronger bet.

Step 4: Make the Final Selection

Put together a detailed request for proposal, which should spell out sustainability priorities, expected deliverables, timelines and a budget range.

Schedule interviews with the actual team members who would do the work. A firm’s reputation matters, but the people assigned to the community’s program will determine the quality of results. Ask for case studies from similar projects and check references with past public-sector clients.

8 Top ESG Consultants to Consider

The methodology for selecting these firms looked at industry reputation, range of sustainability solutions and documented public-sector experience. The evaluation prioritized firms with a record of working alongside communities and government agencies, not just private-sector clients. Specializations across the group range from big-picture strategy to hands-on technical work.

1. TRC Companies

TRC Companies brings more than 50 years of experience to sustainability and energy efficiency consulting, dating back to 1969. The firm’s tested practitioners include certified industrial hygienists and licensed engineers who deliver end-to-end project support from initial concept through in-service assets. TRC’s regulatory expertise spans multiple industries, which makes it a strong fit for communities managing compliance requirements across energy, water and environmental programs.

TRC specializes in creating and managing programs for agencies and utilities rather than for individual businesses, which aligns well with the public-sector model. The firm’s proficiency in modern software and technology supports comprehensive testing and data collection at every project stage. It is a reliable match for city managers who want a partner that can take on the full project lifespan with real technical depth.

Key features:

Manages projects from concept through in-service asset monitoring
Employs certified industrial hygienists and licensed engineers with regulatory expertise across several markets
Runs testing and program management on advanced software and data platforms

2. Boston Consulting Group

Boston Consulting Group (BCG) applies its global strategy strength to sustainability through decarbonization roadmaps, climate risk modeling and sustainable finance advisory. BCG completed over 3,000 societal impact cases in 2024, up 19% from 2023. The firm’s data-heavy approach works well for organizations tying sustainability strategy to broader economic planning.

BCG’s ESG work targets transformation at the leadership level, using proprietary benchmarking tools and scenario analysis. City managers who need a partner to shape a long-term sustainability vision at the council or executive level will find BCG’s analytical depth worth considering.

Key features:

Builds data-driven decarbonization roadmaps using proprietary benchmarking and scenario analysis tools
Supports public and private sector organizations with climate risk modeling and sustainable finance
Ties sustainability work with broader economic development and workforce planning

3. ERM

ERM is a global advisory firm focused on sustainability, with over 8,000 practitioners in 44 countries. Its solutions span environmental health and safety compliance, technical environmental assessments, ESG reporting, and climate risk management. ERM has been doing ESG due diligence for more than 50 years.

Because ERM is all about sustainability work, every engagement draws on deep domain knowledge. The firm covers carbon market advisory, remediation, water consulting and social impact assessments. Communities that want a partner whose entire business is environmental risk will find ERM hard to match on focus.

Key features:

Operates as a sustainability-only advisory firm with thousands of practitioners worldwide
Offers ESG due diligence backed by more than 50 years of experience
Covers carbon markets, environmental remediation, water consulting and social impact work

4. WSP

WSP is a global engineering and advisory firm with tens of thousands of employees working across more than 100 sectors. Its sustainability solutions include sustainable infrastructure design, climate risk analysis and renewable energy engineering.

WSP’s greatest value to city managers is its ability to embed ESG goals into infrastructure planning and design. Communities with large-scale infrastructure spending on the horizon will find WSP’s engineering-first take on sustainability especially relevant.

Key features:

Builds ESG objectives into large-scale infrastructure design and engineering projects
Employs a global workforce of over 80,000, delivering projects across 100-plus sectors
Fields specialized teams across climate adaptation, water resources, soil science and sustainability planning

5. McKinsey & Company

McKinsey & Company brings its strategy consulting muscle to sustainability transformation, green business building and climate risk. Its proprietary benchmarking tools and materiality assessments give its strategy work a strong data backbone.

McKinsey’s sustainability work zeroes in on assigning a dollar figure to ESG risks and opportunities. City managers looking for quality strategic advisory backed by extensive original research will find McKinsey’s approach well-suited to long-range community planning.

Key features:

Serves public-sector and private-sector clients across decarbonization, energy transition and circular economy engagements
Quantifies the financial stakes of ESG factors using proprietary benchmarking tools
Publishes original research on decarbonization economics, energy transitions and circular economy strategy

6. Bain & Company

Bain & Company built its sustainability practice around getting results. The firm completed more than 850 climate and sustainability projects in 2024 alone, more than doubling its sustainability workload since 2021. Its 2025 Visionary CEO’s Guide to Sustainability argues that pragmatic action on sustainability will separate tomorrow’s leaders from the rest.

Bain’s sustainability work focuses on integrating ESG into everyday operations, from supply chains to circular-economy models. City managers who are tired of vague targets and want real operational change will find Bain’s approach worth a serious look.

Key features:

Completed more than 850 climate and sustainability projects in 2024
Focuses on making sustainability part of daily operations
Builds business cases that show where the money goes and what it returns — useful for budget conversations with council members

7. Deloitte

Deloitte runs one of the broadest sustainability and ESG consulting practices, covering ESG reporting and assurance, climate strategy, risk management and regulatory compliance. The firm earned Leader status in the 2025 Verdantix Green Quadrant for climate change consulting.

Deloitte’s government and public services practice is especially worth noting for city managers. Its 2024 survey of U.S. public-sector CxOs produced one of the most detailed looks at government sustainability progress available today. Communities that need to match sustainability efforts with strict reporting standards will find Deloitte’s range of capabilities compelling.

Key features:

Earned Leader status in the 2025 Verdantix Green Quadrant for climate change consulting
Runs a dedicated government and public services practice with public-sector sustainability research
Deploys its GreenLight Solution to build project roadmaps and target energy transition investments

8. KPMG

KPMG centers its sustainability consulting on ESG reporting standards, decarbonization strategy and sustainable finance assurance. The firm’s latest Survey of Sustainability Reporting found that 90% of the 100 largest companies in major global markets now publish sustainability reports voluntarily.

KPMG’s real strength is taking complicated reporting rules and turning them into clear compliance programs. City managers watching as credit rating agencies weigh ESG factors more heavily will want a partner that can translate global disclosure requirements into solutions that actually fit a local government’s budget and schedule.

Key features:

Advises on major ESG reporting standards, including CSRD and ESRS
Translates global reporting requirements into compliance programs sized for local government operations
Specializes in sustainable finance assurance and decarbonization strategy

Comparing the Best Providers

City managers can use the table below as a quick reference when narrowing down candidates.

Consultant	Key Solutions	Best for
TRC Companies	End-to-end project management, regulatory compliance, energy efficiency programs, testing and data collection	Communities and agencies needing a technical partner for the full project lifespan
Boston Consulting Group	Decarbonization roadmaps, climate risk modeling, sustainable finance advisory	Organizations tying sustainability strategy to broader economic planning at the leadership level
ERM	Environmental health and safety, ESG due diligence, carbon market advisory, environmental remediation	Organizations that want a partner focused entirely on sustainability and environmental risk
WSP	Sustainable infrastructure design, climate risk analysis, renewable energy engineering	Communities embedding ESG goals into large-scale infrastructure planning and design
McKinsey & Company	Sustainability transformation, climate risk quantification, decarbonization strategy	Public and private sector clients wanting top-tier strategic advisory backed by original research
Bain & Company	Sustainable supply chains, circular economy models, ESG integration into daily operations	Organizations wanting sustainability embedded in day-to-day operations with measurable results
Deloitte	ESG reporting and assurance, climate strategy, regulatory compliance, energy transition planning	Communities aligning sustainability work with strict reporting and compliance standards
KPMG	ESG reporting standards, decarbonization strategy, sustainable finance assurance	Organizations focused on ESG disclosure and translating global reporting requirements into local government operations

Frequently Asked Questions

The answers below address common concerns that come up during planning and procurement.

What should the community prepare before engaging a consultant?

Communities should gather existing environmental data, such as utility bills, waste diversion reports and water usage records. Documenting any sustainability policies or resolutions the city council has already adopted is also useful. Having a preliminary budget range and a designated internal point of contact will speed up onboarding and demonstrate to the firm that the community is serious.

How is the success of an ESG program measured?

ESG programs track both numbers and qualitative progress. In terms of the environment, communities measure greenhouse gas reductions, energy savings and water quality improvements. Social metrics can include workforce diversity, community engagement participation and equitable access to new infrastructure. Governance measures focus on transparency, disclosure quality and alignment with standards.

What is the difference between ESG and sustainability?

ESG is a structured way for investors and rating agencies to evaluate an organization’s environmental, social and governance risks. Sustainability is a broader idea covering long-term environmental stewardship, economic viability and social well-being. The language has shifted in recent years, with sustainability now the go-to term for public-facing communications, while ESG remains common in financial and regulatory settings.

Choosing a Partner for a Sustainable Future

Selecting an ESG consultant is a decision that outlasts any single procurement cycle. The right partner is the one who brings technical rigor and program management to every phase of a community’s sustainability work. Defining goals, vetting candidates and matching expertise to local needs sets the stage for lasting results.

How to Choose the Right ESG Consultant for Your Business

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What Does an ESG Consultant Do?