ESCO Technologies, Inc. is a producer of engineered products and systems, which engages in the provision of utility, industrial, aerospace, and commercial applications. It operates through the following segments: Aerospace and Defense, Utility Solutions Group, and RF Test and Measurement. The Aerospace and Defense segment designs and manufactures filtration products, including hydraulic filter elements and fluid control devices used in commercial and defense aerospace applications, filter mechanisms used in micro-propulsion devices for satellites, and custom designed filters for manned aircraft and submarines. The Utility Solutions Group segment provides diagnostic testing solutions that enable electric power grid operators to assess the integrity of high-voltage power delivery equipment. The RF Test and Measurement segment focuses on providing customers with the ability to identify, measure and control magnetic, electromagnetic, and acoustic energy. The company was founded in October 1990 and is headquartered in St. Louis, MO.