In 2026, the landscape of Environmental, Health, and Safety (EHS) and Environmental, Social, and Governance (ESG) consulting has shifted from a “compliance-only” focus to a “strategic-value” model. Organizations now view safety and sustainability not just as risks to be managed, but as core components of their brand equity and operational resilience. The following highlights the premier firms leading this global transition (in my humble opinion).

1. ERM (Environmental Resources Management)

Best for: Global “Pure-Play” Sustainability Strategy

ERM remains the largest global “pure-play” sustainability consultancy. Unlike multi-disciplinary engineering firms, ERM’s entire business model is built around EHS and ESG. In 2026, they are the go-to partner for Fortune 500 companies looking to integrate decarbonization pathways with traditional occupational health and safety.

• Key Strength: Their “boots to boardroom” approach, which connects technical field data (like site remediation) to high-level ESG disclosures for investors.

• Specialization: M&A due diligence and climate-related financial risk.

2. dss+ (formerly DuPont Sustainable Solutions)

Best for: Safety Culture and Operational Risk

Originating from the safety-obsessed culture of DuPont, dss+ is widely regarded as the gold standard for operational risk management. They specialize in the “human element” of safety—transforming corporate culture so that safety becomes an intrinsic value rather than a set of rules.

• Key Strength: Behavioral safety and operational excellence. They are often brought in for high-hazard industries like mining, oil and gas, and chemicals.

• Specialization: Reducing Serious Injuries and Fatalities (SIF) and enhancing organizational resilience.

3. AECOM

Best for: Large-Scale Infrastructure and Environmental Engineering

As a global infrastructure giant, AECOM offers massive scale. Their EHS consulting is deeply integrated with their engineering capabilities, making them the preferred choice for massive environmental projects, such as PFAS remediation or sustainable urban redevelopment.

• Key Strength: Technical depth and global reach. They possess some of the most advanced environmental laboratories and modeling capabilities in the world.

• Specialization: Remediation, restoration, and complex regulatory permitting.

4. WSP

Best for: Integrated EHS and ESG Digital Solutions

WSP has rapidly climbed the rankings through strategic acquisitions (such as Golder and Wood E&I). In 2026, WSP is a leader in “Digital EHS,” helping companies move away from spreadsheets and toward AI-driven safety management systems.

• Key Strength: Combining environmental science with digital technology to provide real-time ESG monitoring.

• Specialization: Climate adaptation, biodiversity strategy, and digital compliance platforms.

5. The “Big Four” (Deloitte, PwC, EY, KPMG)

Best for: ESG Reporting, Audit, and Assurance

While traditionally accounting firms, the Big Four have built massive ESG consulting arms. They dominate the “Governance” aspect of ESG, helping firms navigate the maze of global reporting standards (like CSRD, ISSB, and SEC climate rules).

• Key Strength: Financial integration. They ensure that safety and environmental data are robust enough to withstand a financial audit.

• Specialization: ESG disclosure, green tax incentives, and supply chain transparency.

Comparison of Top Firms by Focus Area

2026 Industry Trends to Watch

1. AI-Powered Safety: Consultants are increasingly using predictive analytics to identify “near-miss” patterns before an actual accident occurs.

2. Psychosocial Safety: Driven by new regulations in regions like Australia and the EU, firms are now hiring psychologists to consult on mental health and workplace stress as part of the “Safety” (S) in EHS.

3. Nature-Positive ESG: Beyond just carbon footprints, consulting firms are now being asked to measure a company’s impact on biodiversity and water scarcity.

Contact info@ehsod.com for more details, references or information.