This expert has extensive experience in digital and analog engineering, both in hardware and software aspects. His work has included operating system design and testing for data acquisition, graphics, and embedded applications. He has also designed and developed avionics for both commercial and military aircraft, including electronic warfare (EW) systems for the US and foreign governments. Other work includes electronic security aspects for public buildings, airframe integrity and safety, and wireless communications security. Also a professor, this expert has taught at the University of Texas on computer architecture, graphics hardware systems and operating system design, and is frequently called to testify as an expert in cases involving Intellectual Property and computer IC design.