Cornerstone Engineering, LLC, was established in 2017 by Mauricka McKenzie, Sr., P.E. to provide civil engineering, water resources engineering (water, wastewater and storm water), geotechnical engineering, solid waste management, contract administration and project management services to public and private entities 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, Texas, and Tennessee.