Jeffrey joined Walmart AI Lab. Prior to Walmart, Jeffrey is the Chief Data Scientist at AllianceBernstein. In this role, he is responsible for leading the global data science group, partnering with investment professionals to create investment signals, and collaborating with sales and marketing teams to optimize sales. Graduated with a Ph.D. in economics from the University of Pennsylvania, he has also taught statistics, econometrics, and machine learning courses at UC Berkeley, Cornell, NYU, the University of Pennsylvania, and Virginia Tech. Previously, Jeffrey held data science and analytic leadership positions at Silicon Valley Data Science, Charles Schwab Corporation, and KPMG.