About the Instructors

O. Nathan Ronen, CFA - Lead CFA Instructor

Dr. Carl Crego, CFA


O. Nathan Ronen, CFA, is the lead CFA instructor at NYSSA and has helped over 20,000 candidates pass the CFA exams. He has been teaching CFA Levels I, II, and III for 19 years. Ronen worked as a supervisory analyst training government regulators, an accounting analyst, and a corporate finance analyst. His professional experience encompasses well-known organizations such as New York Life, NASD, and Salomon Brothers. In addition to teaching CFA exam preparatory courses for NYSSA, he has taught for the Washington Society of Security Analysts and the Study Seminar for Financial Analysts (SSFA). Ronen has also taught in-house CFA seminars at Goldman Sachs, Merrill Lynch, Citigroup, and many other major financial institutions. He holds an MBA in finance and accounting from the University of Chicago.

Dr. Carl Crego, CFA, has been helping his students reach their goal of earning the coveted CFA charter for the past 25 years. Crego has extensive experience teaching all three levels of the CFA curriculum, including CFA exam review courses for NYSSA, the Abu Dhabi Investment Authority, and Kaplan Schweser (Hong Kong). He also served as a technical editor for the content development of Kaplan Schweser CFA Level I Study Notes. Crego received his MBA and PhD from the George Washington University and taught undergraduate and graduate finance courses at Pace University for seven academic years. Crego previously worked at NYSSA as an educational consultant. He helped develop their educational programs from short preview courses to a full range of continuing education courses and the popular CFA review program.

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