- Energy Environmental Consultants
- Baldwin - Provides energy reduction services. - Thermal Science Technologies
- Hanover - Offering ConduFill, a reinsulation process for high-temperature, underground steam lines. - Thermomax
- Columbia - Dedicted to the latest innovative solar technologies, services, solar controllers, energy monitors, evacuated heat pipe solar collectors, and related components. - UEK Corporation
- Annapolis - Renewable energy company which designs, manufactures and installs underwater turbines to produce green power without a dam.
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