In 2003, Illgen Simulation Technologies was acquired by Northup Grumman. With facilities in CA, FL, Washington and Texas, Illgen Simulation Technologies, Inc. (ISTI), is an information systems company, specializing in high technology software development, analysis, modeling and simulation, test and evaluation, verification and validation, and the application of these information-based technologies to a variety of disciplines. With specialties in software development and test, navigation and communications; today it is part of the Mission Systems sector of Northup Grumman.