Jonathan joined Peer39 from Nielsen Online where he served as VP of Research and Development responsible for key areas of the company’s core research and innovation in the area text-mining solutions and computational linguistics. Prior to his work at Nielsen, Jonathan was VP of Research and Development of Trendum (acquired by Nielsen), and worked at Microsoft’s Machine Learning and Anti-Spam Group. Before that he was an R&D group leader at Clear Forest, a leader in business solutions enabled by text extraction and text analytics (acquired by Reuters). Jonathan holds a Ph.D. from Bar-Ilan University, concentrating on machine learning, text categorization and classification, and natural language processing (NLP).