States
California Environmental Protection Agency
Maine Department of Environmental Protection
New Jersey Department of Environmental Protection
Ohio Environmental Protection Agency
Pennsylvania Department of Environmental Protection
West Virginia Division of Environmental Protection

Commercial
WinSim Inc. - Process simulation for plant design.

Dixon Environmental - Specializes in providing air permitting and compliance, environmental engineering, and environmental data management consulting services to clients in the chemical, pharmaceutical and industrial manufacturing industries.  Dixon Environmental has been providing clients with Emission Master assistance for permitting and MACT compliance for over 10 years.