Hillis-Carnes Capitol Services, PLLC

30+ years in business. Hillis-Carnes Capitol Services, PLLC is a multi-specialty engineering firm with advanced capabilities in geotechnical and geostructural engineering, environmental consulting, specialty construction, construction materials engineering and testing, and third-party inspections. If there’s construction, we’re there — schools, stadiums, highways, housing developments — in any location throughout the Mid-Atlantic and beyond. HCCS, is a Certified Business Enterprise (DC CBE #LZ2898032025) and can meet any District Resident Requirements, as more than half of our Field Staff reside in The District. This local office was established within The District in order to be more accessible to our urban Clients and projects.