Founded in 1969 in Sumner, Washington by leaders in the field of wastewater engineering, Parametrix has grown through the years to include additional core disciplines in transportation, natural resources, toxicology and risk sciences, solid waste management, and community building. In 2008, Parametrix added cultural resources to the core services that we offer through our acquisition of Taschek Environmental Consulting in New Mexico.

Parametrix became 100 percent employee owned when the original founders completed a 10-year planned sale of the firm to the employees. The transition in ownership has resulted in continued growth as well as providing a foundation and history as the firm develops into the future. Today, we are over 500 scientists, engineers, and planners. Our offices are now in several cities throughout the western United States, but our clients span every corner of the globe. Our 30-year-long culture of rich collaboration earned us the recognition of national Employee-Owned Company of the Year.