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Cornerstone Engineering, was established in 2017 by Mauricka McKenzie, Sr., P.E and provides general civil engineering, water resources engineering (drinking water, wastewater and stormwater design), structural engineering, geotechnical engineering, aviation planning and design, construction material testing, and solid waste management planning services to federal, state, and local governments, developers, water associations, architect/engineers and industrial entities. We offer our services throughout Mississippi, Alabama, Georgia, Tennessee, Louisiana, Arkansas, Wisconsin, Florida, and Texas. Due to a name overlap with a non-related company, we operate under Nehemiah Engineering, LLC, in Alabama, Arkansas, and Tennessee.