ESEA has corporate offices in Los Altos, California. providing contractual services addressing * Technology assessment * Establishment of system concepts * Technical feasibility assessment * Design selection * Realistic performance assessment * Risk assessment * Technical program monitoring. These have included, Shipboard electronic warfare equipment analysis and specification of shipboard EW equipment.; Digital computer analysis and design support for digital avionics computers for use on tactical and reconnaissance aircraft; Emitter location system technical monitoring of the development and test of a high probability of intercept, precision emitter locating system for use on tactical aircraft; Missile systems design of operating system and flight envelope software for anti-radiation airborne missiles; Tornado defensive aids system engineering for the integration of the Tornado defensive aids subsystems: Integrated EW suite analysis of requirements and system engineering for the specification and design of an integrated EW suite for a next generation fighter aircraft; SIGINT integration system analysis and evaluation of separate SIGINT systems to determine the feasibility of functional integration and cooperative operation; Flight simulator enhancement development of ESM simulation software for use in a tactical aircraft crew trainer.