Jacob is Professor of Marketing and Advertising at the Leon Recanati Graduate School of Business, Tel Aviv University.
From 1994-1997 he was the Associate Dean of the School, and from 1998-2003, chair of the Marketing Department. From 1988 (established) -1993, he was chair of the Health Systems Management program.
He is an active consultant to various companies and advertising agencies and a member of the Board of Directors at various Israeli corporations. Serves on the editorial boards of leading journals.
Professor Hornik has taught and lectured at the University of Chicago; Kellogg - Northwestern University; New York University; University of Washington at Seattle; Chulalongkorn University (Bangkok); Hong Kong University of Science and Technology: ESSEC Business School – Paris; Bocconi University – Milan; Universidad Catolica De Chile, and various professional meetings in the U.S.A, Europe and the Far East.