Rinker Design Associates, LLC (RDA) Rinker Design Associates, LLC (RDA) is a distinguished civil engineering firm based in Virginia, with over 180 employees and offices located in Manassas (headquarters and satellite), Fredericksburg, Richmond, Virginia Beach, and Waynesboro.

For more than 42 years, RDA has built a solid reputation for providing conscientious and reliable service to municipalities, governmental agencies, and private industries located throughout Virginia – service that our clients and their communities deserve. We pride ourselves in offering high quality deliverables and support services that meet project, budget, and schedule requirements, exceeding our clients’ expectations.

Services provided by RDA include Transportation; Traffic; Utility Design, Relocation, and Coordination; Right of Way; Structures/Bridges; Site, Civil, and Infrastructure; Surveying; Geotechnical; Design-Build; and Construction and Environmental Services.