I have over 22 years of experience as a Senior and Principal Member of the Technical Staff in the Photovoltaic Technology Department at Sandia National Laboratories in Albuquerque, New Mexico. I excelled in the development and fabrication of advanced silicon and compound semiconductor photovoltaic cells. I assisted key members of the U.S. photovoltaics industry to improve the performance and cost of their silicon cell products. I also compared PV module and system performance measurements with energy-production model predictions, and developed improvements to predictive model algorithms. I have extensive experience using Solar Advisor Model, PVsyst, and PVWatts performance models.I have a broad, overall knowledge of the photovoltaics industry, especially the technologies of crystalline and multicrystalline silicon, and concentrating photovoltaics using compound semiconductors for solar cells. I have a strong background in semiconductor devices and team-oriented approach to problem-solving. I am skilled at PV cell and module testing and performance analysis. My methodology involves accurate device measurement, careful performance modeling, determination of performance limiting mechanisms, and development of plans for implementing cost-effective methods of performance improvement. I have extensive experience in the use of statistically designed experiment software.I have now been a PV consultant for over 15 years and have a long list of recommendations from clients. As a consultant, I have performed due diligence for PV engineering companies involved in utility-scale power plant installations. I recently developed a short-course in PV technology that includes sections on module reliability, degradation mechanisms, and diagnostic measurements.