Guy Yalif leads global product marketing for Twitter. Guy's organization is responsible for advertising product strategy and messaging. Before Twitter, Guy led advertising product marketing at Yahoo!. While at Yahoo!, Guy spent seven years serving advertisers large and small in search, display, online presence, and finally across all of Yahoo!'s ad products. Before Yahoo!, Guy led product management and product marketing at Tradeweave, an online marketplace in retail. Guy also spent time at Microsoft and the Boston Consulting Group. Guy graduated summa cum laude from Princeton University in Mechanical and Aerospace Engineering and was an Arjay Miller Scholar at the Stanford Graduate School of Business..