Sevenson Environmental Services, Inc. provides a comprehensive range of services for the cleanup of sites and facilities contaminated by hazardous materials. Sevenson was founded in 1977 as a general contractor. Sevenson entered the environmental cleanup business in 1979 when Sevenson was selected as the principal contractor for remediation work at the Love Canal site in Niagara Falls, New York.

Sevenson has completed over 1,200 environmental remediation projects with a combined value over $2.5 billion, including projects at more than 100 sites on the US Environmental Protection Agency's Superfund list.

Sevenson is headquartered in Niagara Falls, New York, where Sevenson maintains its principal shop, yard and equipment maintenance facility. Sevenson and its subsidiaries also maintain offices in Pittsburgh, Philadelphia, Chicago, Los Angeles and Buffalo, New York. The Buffalo location is the site of Sevenson's full-service environmental testing and treatability study laboratory.

Sevenson's customers include major industrial companies and federal and state agencies. Sevenson provides services throughout the continental United States and has also completed projects in Canada and Puerto Rico.

Sevenson owns and operates a fleet of conventional and specialized equipment and vehicles used in Sevenson's operations. For special applications, Sevenson designs and fabricates its own equipment and systems.