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 Aerospace & Defense (A&D), RF Shielding and Test, and Utility Solutions Group (USG) segments. The A&D segment designs and manufactures specialty filtration products, including hydraulic filter elements and fluid control devices used in commercial aerospace applications, unique filter mechanisms used in micro-propulsion devices for satellites, custom designed filters for manned aircraft and submarines, products and systems to reduce vibration and/or acoustic signatures and otherwise reduce or obscure a vesselâ€™s signature, and other communications, sealing, surface control and hydrodynamic related applications to enhance U.S. Navy maritime survivability, precision-tolerance machined components for the aerospace and defense industry, and metal processing services. The RF Shielding and Test segment identifies, measures, and contains magnetic, electromagnetic and acoustic energy through ETS-Lindgren Inc. The USG segment provides diagnostic testing solutions that enable electric power grid operators to assess the integrity of high-voltage power delivery equipment, as well as decision support tools for the renewable energy industry, primarily wind and solar. The company was founded in August 1990 and is headquartered in St. Louis, MO.