I have 24 years of experience and specialize in the fields of human factors and neuropsychology, with specific knowledge of software design and evaluation, human computer interaction and neurological loss from tramatic brain injury. I have published on such topics as human factors and software design, evaluation, human computer interaction, and system usability and application of computer based systems to the evaluation of traumatic brain injury. I have testified on defective control system design, non-standard software design procedures and loss of high-level cognitive skills due to traumatic brain injury.