RSA+ (formerly Riechers Spence & Associates) is a consulting engineering firm serving Northern California and specializing in planning, civil engineering and surveying services. Founded in 1980, we have earned a solid reputation by completing many successful projects in both the public and private sectors, including commercial, residential, hotel/resort and winery site development as well as public and capital improvement projects. RSA blends its diverse experiences in order to offer innovative and creative solutions to our Clients? complicated engineering problems. Let RSA take you from feasibility through permitting and construction to the successful conclusion of your next development project.