Carrie Seifer

Carrie Seifer is President, Digital, Data & Technology at Mediavest USA. In her role, Seifer leads a team of digital and adtech experts across digital partnership strategy and negotiations, programmatic, and technology solutions. Based in New York, Seifer is a member of Mediavest’s executive leadership team and reports to Chief Operating
Officer, Sarah Kramer. Seifer is at the helm of Mediavest’s agency-of-the-future mission for digital, programmatic, data, and technology-enabled experiences and partnerships. She is responsible for the integration of programmatic technology, talent, and operations in order to improve Mediavest’s value proposition for clients. A 20-year digital industry veteran, Seifer has led teams and advertisers into the digital age by developing ad tech, products, and partnerships that create scalable ROI while not frustrating users. She most recently served as SVP, Strategy at Millennial Media, the third largest mobile advertising marketplace, where she led global

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