Armstrong

A family owned and operated leader in the telecommunications, security, commercial development, and electronics manufacturing industries.

Baltimore Gas & Electric

Beacon Environmental

Harford County Trash Services, LLC

JPS Electrical Services

Mattingly Electric Inc.

Chesapeake Environmental Mgmt

CQI Associates

Ecotone, Inc.

Exelon Hydro - Conowingo Dam

Ferrell Fuel Co. Inc.

Landmark Science & Engineering

Maryland American Water

Southern States Cooperative, Inc.