D&H United Fueling Solutions is the leading supplier of both petroleum fueling and EV charging system equipment, installation, and service across the Southwest, Midwest and Rocky Mountain regions. D&H United is an authorized distributor and service provider for Gilbarco Veeder- Root as well as other major equipment brands. The company has 33 branch offices and more than 1,100 employees operating throughout the United States. D&H United provides industry leading compliance testing solutions in all 50 states through its Tanknology, Valley Tank Testing and PS&C subsidiaries.