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, and solid waste management. Parametrix became 100% employee owned when the original founders completed a ten year planned sale of the firm to the employees. The transition in ownership has resulted in continued growth as well as provides 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 in the West, but our clients span every corner of the globe. Our thirty year long culture of rich collaboration earned us the recognition of national Employee-Owned Company of the Year.