S.D. Deacon Corp. of Oregon is a construction company located in Portland, Ore. The firm is a part of S.D. Deacon, which is one of the largest contractors in the United States. Founded in 1981, the parent company also maintains offices in Sacramento, Calif., Irvine, Wash., and Seattle. Its portfolio of work includes the retail, hospitality, education, automobile dealership, health care and industrial sectors. S.D. Deacon provides preconstruction services to architects, developers and homeowners. The parent company also offers project management and field supervision services. Its clients include Chelsea Property Group, Donahue Schriber, Majestic Realty, MBK Northwest, Regency Centers, Target and Vulcan Properties.