Investor Presentation November 2023

Capabilities Aligned with Emerging Political & Regulatory Priorities Climate Change & Event Driven Response Emerging Contaminant Regulation (e.g., PFAS) Infrastructure and Defense Spending Greenhouse Gas Mitigation & Air Quality Increased Regulatory Enforcement (i.e., EPA, SEC) Renewable Energy and Reduced Carbon Intensity Focus on Environmental Matters Creates Tailwinds for Montrose Advisory Testing Remediation Water Treatment Renewable Response © 2023 Montrose Environmental Group, Inc. Proprietary. | 7

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