CACI International Inc (CACI) is a holding company, which operates through its subsidiaries located in the United States and Europe. It is a provider of expertise and differentiated technology to customers in support of national security in the intelligence, defense, and federal civilian sectors. Its segments include Domestic Operations and International Operations. The Domestic Operations segment provides expertise and technology to U.S. federal government agencies. The International Operations segment provides expertise and technology to international government and commercial customers. It provides a diverse mix of IT services and proprietary data and software products, serving commercial and government customers throughout the United Kingdom, continental Europe and around the world. Its software offerings consist of signals intelligence (SIGINT), electronic warfare (EW), and intelligence, surveillance, and reconnaissance (ISR), across multiple domains, platforms, and customer sets.