Ronald Cook

L-3 Communications Holdings, Inc. operates as a holding company. It operates through its subsidiary L-3 Communications Corp., which is a prime contractor in intelligence, surveillance and reconnaissance systems, command, control, communications, aircraft modernization and maintenance, and sustainment of aircraft, maritime vessels and ground vehicles, and national security solutions. The company operates its business through Aerospace Systems, Electronic Systems, Communication Systems and National Security Systems segments. The Aerospace Systems segment delivers integrated solutions for the global Intelligence, Surveillance and Reconnaissance (ISR) market and provides modernization, upgrade, sustainment, and maintenance and logistics support for a wide variety of aircraft and ground systems. The Electronic Systems segment provides a broad range of components, products, subsystems, systems and related services for military and commercial customers. The Communication Systems segment delivers products and services for the global communications market, specializing in strategic and tactical airborne, space, ground and sea-based communication systems. The National Security Solutions segment provides cyber security solutions, high-performance computing, enterprise IT services, analytics and intelligence analysis. The company was founded by Frank C. Lanza and Robert V. LaPenta in April 1997 and is headquartered in New York, NY.

Leidos Security Detection & Automation U.K. Ltd. provides communication services. The company was founded on June 11, 1997 and is headquartered in London, the United Kingdom.

Part of L3Harris Technologies, Inc., L3Harris Unlimited functions as an investment holding British company. The company is based in London, UK.

L3 MAPPS Ltd. provides infrastructure technology products and system solutions for military and commercial platforms. It designs and supplies navigation, communications, automation, and training solutions for the royal navy and commercial marine market. The company was founded in 2005 and is headquartered in Burgess Hill, the United Kingdom.

Founded in 1983, L3Harris TRL Technology Ltd. is a subsidiary of L3Harris Technologies, Inc. Based in Tewkesbury, UK, the company employs over 1,500 people across 12 sites in the UK. The British company provides unique capabilities in air, land, sea, space, and cyber for military, security, and commercial customers worldwide.

CTC Aviation Group Ltd. provides tailor-made airline training services. Its services include pilot training, simulator training, cabin crew services, consultancy, management and other associated services. The company was founded by Christopher Kevin Clarke in 1995 and is headquartered in Southampton, the United Kingdom.

MacDonald Humfrey (Automation) Ltd. designs and manufactures industrial automation and control systems. The firm provides automation and technology to facilitate the manufacture of various products in industrial environments. MacDonald Humfrey serves manufacturers across diverse industries worldwide. The company was founded in 1988 and is headquartered in Luton, the United Kingdom.

Part of L3Harris Technologies, Inc., CTC Aviation Services Ltd. provides airline crew and pilot training courses for the aviation industry. The company is based in Southampton, UK.

Founded in 2002, CTC Aviation Training (UK) Ltd. is a British business support services company that is part of L3Harris Technologies, Inc. The company is based in Nursling, UK.