I am a mechanical engineer, with over 40 years of experience in the field of internal combustion engines, specializing in diesel and natural gas engines and related technologies. I started my career in 1973 with a company where I gained valuable experience in engine design and development, before moving to the university sector in 1981. I developed research programs in diesel and natural gas engine technologies and taught bachelors’ and master’s courses in diesel engine technology, and advised graduate students at doctoral and masters levels in the field of internal combustion engine technology. In business, I have also managed the development of new technologies and innovation through small teams – processing to the leadership of a large global engineering organization with greater than 2,000 engineers. My leadership role in innovation and technology development, new product development and support has included managing resources and product development in both leading and emerging markets – most notably Brazil, India, and China. I was directly involved with almost every new engine and exhaust emission program from 1993 to 2014. These programs delivered successful engine designs with dramatic reductions of criteria pollutants, oxides of nitrogen (NOx) and particulate matter (PM) of over 98% to near-zero levels. I provided emission regulations promulgated by EPA and California. I have prior expert witness experience with consultation and deposition.