Established in 1971, Electrical Reliability Services is one of the leading electrical testing, maintenance and engineering services companies in the United States. It offers a variety of field services, such as commissioning, acceptance and maintenance testing, start-up substation, instrumentation and control, and transmission and distribution. The company provides a range of laboratory services, including calibration, forensic evaluation and radio frequency interference. Electrical Reliability Services also offers conformity assessment and energy management solutions. It provides a variety of technical services, such as electrical design, value engineering and project management. The company employs a staff of more than 300 engineers, technicians and support professionals. Electrical Reliability Services operates service centers throughout the West, South and Midwest. The company is a wholly owned subsidiary of Emerson, which is a manufacturing and technology company.