Founded in 1987, Power Services Incorporated is located in Bowie, Maryland. PSI is currently ranked the 9th largest Electrica ... l Contractor by the Washington Business Journal, serving both public and private sector clients in the Washington DC and Baltimore Metropolitan markets in the data center, biotechnology, laboratory, federal, defense and health care fields. Specific capabilities include high, medium and low voltage systems, primary and secondary power distribution, power generation, critical power and UPS systems, lighting, lighting control, life-safety, telecommunication, security, power monitoring and energy management systems. read more