Agencies
- Maryland Port Administration
- Maryland Environmental Services
- Maryland State Highway Administration
- DC Water and Sewer Authority
- Washington Suburban Sanitary Commission (WSSC)
- Maryland Stadium Authority
Cities & Counties
- The City of Baltimore
- The City of Reading
- Anne Arundel County
- Baltimore County
- Cecil County
- Howard County
- Prince George’s County
- Talbot County
- Washington County
- Town of Rising Sun
- The City of Frederick
- Frederick County
- The City of Annapolis
- Wicomico County
- Carroll County
Department of Transportation
- District of Columbia Department of Transportation (DDOT)
- Delaware Department of Transportation (DelDOT)
- Virginia Department of Transportation (VDOT)
School Systems
- Baltimore City Public Schools
- Baltimore County Public Schools
- Prince Georges County Public Schools
- University of Maryland
- Salisbury State University
Private Clients
- Consol Energy (CNX) Baltimore Terminal
- PEPCO
- CSX Marine Terminal
- BGE
- Solo Cup
- ALCOA