Parametrix was founded in 1969 in Sumner, Washington by Waite Dalrymple and George Capestany as Delta Engineering. Originally focused on the wastewater business, the firm grew quickly and diversified into six very different business divisions by 1974. Two divisions, Delta Engineering and Seattle Marine Laboratories, were restructured as Parametrix. 

From the beginning, Parametrix had an entrepreneurial spirit; a culture of integrity, client service, fun, and collaboration; and a commitment to the well-being of its employees.

The entrepreneurial spirit spurred growth through diversity in services and locations and through acquisitions. Today, we are a company of 750 employee-owners with offices across the western United States.