 Mendell also worked with Bon Jovi.In the late 1980s onwards, Mendell moved into conceptualizing and designing computer algorithms for international finance, and became an expert on global risk management, option trading and volatility research, as well as machine learning and natural language processing.As an undergraduate at the University of Pennsylvania in the 1970s, Mendell took a course during which he studied the Moog synthesizer, an analog synthesizer.