I have more than 35 years of experience in New York in diverse fields ranging from financial markets trading, risk management, and investments to semiconductor physics, signal processing in electrical engineering, applied mathematics, and theoretical physics. I began my career as a semiconductor device physicist making numerous technical contributions and inventing novel techniques. After an intervening period as an academic researcher and teacher in applied mathematics, I launched a career on Wall Street. In these nearly 25 years in the financial world, I have become a leading expert in quantitative analysis of all investment and derivative types as well as in the analysis of financial risk and valuation. As practitioner, manager, executive, and consultant, I am a world expert in credit risk, credit ratings, financial insurance, derivative transactions, banking risks, and capital markets generally. I have over 5 years expert witness experience with consultations, depositions, and courtroom testimony.