Dr. Welch's specialty involves the application of General Systems Theory to the Human Factors Engineering analysis, design, test and evaluation, and operation of complex systems, to include hardware, software, personnel, support, and doctrine subsystems. His major expertise is the integration of Human Factors Engineering into the larger System Engineering process for complex system development. He has provided general Human Factors Engineering, MANPRINT Management, System Safety, and Ergonomics support to numerous government, commercial, industrial, and private customers in varied application areas for over thirty years