Founded by David F. Evans, PE, PLS, and David H. Gould on April 1, 1976, David Evans and Associates, Inc. (DEA) is a multi-disciplinary consulting firm doing business in the energy, land development, transportation and water markets.  Centered on the core purpose of improving the quality of life while demonstrating stewardship of the built and natural environment, more than 900 professional surveyors, engineers, planners, architects, landscape architects, natural resources scientists, and construction managers work together to understand client needs, provide creative thinking and technical excellence, and deliver extraordinary service that exceeds expectations. DEA was founded in Portland, Oregon, with offices across the United States.

DEA is recognized as one of the premier land survey firms in the West due to our demonstrated ability, experience, and pioneering spirit, combined with the financial resources to acquire and utilize innovative survey technologies.