Harris Group | 8,100 followers on LinkedIn. People. Partnership. Proven Solutions. | Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States. Founded in 1975 and headquartered in Seattle, Washington, we have a full-time staff of over 100 engineers, designers, project managers, and technical and business specialists. Our ability to provide a total project design solution as one organization ”from inception through completion” is distinctive in the engineering industry.