Whitaker/Ellis is a specialty concrete contractor based in Portland, Oregon and has been serving Oregon and Washington since ... 1997. Our company specializes in a wide range of commercial and industrial applications, including foundations, basement and retaining walls, post-tension decks, slabs, tilt-up construction and complex architectural concrete. Locally owned and operated, the professionals at Whitaker/Ellis have extensive knowledge and experience in all aspects of concrete construction, from light commercial to heavy industrial and the ability to handle projects of all sizes and degree of difficulty. read more