Montrose Environmental Group, Inc. is an environmental solutions company focused on supporting commercial and government organizations. Its Assessment, Permitting and Response segment provides scientific advisory and consulting services to support environmental assessments, environmental emergency response, and environmental audits and permits for operations, facility upgrades, new projects, decommissioning projects and development projects. Its Measurement and Analysis segment includes source and ambient air testing and monitoring, leak detection and repair and advanced analytical laboratory services, such as air, storm water, wastewater and drinking water analysis. Its Remediation and Reuse segment provides clients with engineering, design, and implementation services to treat contaminated water. This segment offers regulatory services. It also specializes in soils, vegetation and wetlands development and reclamation. The Company also offers air permitting and compliance services.