Casella Waste Systems, Inc. is a solid waste management company founded in 1975 in Rutland, Vermont. It started as a small family-run service and has grown into a major resource management provider in the Northeastern United States. The company offers a wide range of services, including solid waste collection, disposal, transfer, recycling, and organics processing, operating nearly 180 facilities across about 10 states.

Casella serves over one million customers, including residential, commercial, municipal, institutional, and industrial clients. Its operations are organized into two regional segments, providing comprehensive waste services and larger-scale recycling. The company emphasizes sustainability and operational efficiency, with formal sustainability goals established in 2018. Recent acquisitions have supported its growth strategy along the Eastern Seaboard. Overall, Casella Waste Systems is dedicated to integrated solid waste management and resource recovery, focusing on sustainability and excellence in service.