Rachael Horwitz is the CMO of Haun Ventures, and she was the VP of Communications at Coinbase.nRachael Horowitz currently serves as the first-ever Spark Capital Marketing and Communications Partner. This role will put Horwitz at the head of the firm’s marketing and communications activities, along with community events and initiatives.nHorwitz spent nearly five years at Twitter as Communications Director, and then took that experience to Facebook’s Communications department for another 15 months.