Division 35 – Waterway and Marine Construction

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Andrew T. Der & Associates, LLC – Residential, Commercial, Institutional Public

Andrew T. Der & Associates, LLC is a sole proprietor firm practicing in the water consulting industry since 2001. The principal served as Director of Environmental Services for two Maryland civil engineering firms, previously completing 18 years of service at the Maryland Department of the Environment. Specialties include wetland and waterway permitting, stormwater management compliance, and expert testimony.