Ms. Cassel has served as CEO of since July 2016. Ms. Cassel joined in November 2011 and served as’s Chief Operating Officer from May 2014 until July 2016. A veteran of the online advertising industry, Ms. Cassel has been helping companies reach prospective customers online for over 15 years. Ms. Cassel has held executive positions at online vertical marketing pioneer Quinstreet, international social media giant Tagged, served as GM of Performance Marketing at Exponential Interactive and headed the B2B marketing division at Ziff Davis Media. Ms. Cassel earned her MBA from Stanford University’s Graduate School of Business and a B.S. in mathematics and quantitative economics from Tufts University.