Montrose Environmental Group Inc is an environmental services company. The firm's operating segments are Assessment, Permitting and Response, Measurement and Analysis, and Remediation and Reuse. Through its Assessment, Permitting, and Response segment, the company provides scientific advisory and consulting services to support environmental assessments, environmental emergency response, and environmental audits. Measurement and Analysis include test and analysis of air, water, and soil to determine concentrations of contaminants whereas, the Remediation and Reuse segment provide clients with engineering, design, implementation, operations and maintenance services, to treat contaminated water, remove contaminant or create biogas. United States Contributes the majority of geographic revenue.