As EVP, Global Head of Brand Assurance, Deva leads dentsu’s US and Global Media Brand Assurance offerings, bringing together Brand Responsibility, Brand Safety, and Brand Suitability to address evolving media threats and enable clients to make the best, most responsible media decisions. In this role, Deva partners closely with others across the organization, including on the Investment and Economic Empowerment teams, to constantly monitor and understand best practices in deliverability, suitability, viewability, responsibility, and sustainability. Deva is also leading the creation of a global Brand Assurance steering committee. Prior to taking on the Brand Assurance leadership role this year, Deva served as the EVP, Head of Digital Investment, leading marketplace strategy and positioning across digital & publishing for dentsu’s US media agencies.


A true digital native with nearly 25 years of experience in the media industry, Deva spent several years within GroupM and Publicis agencies, with client experience spanning the Technology, Pharmaceutical, CPG, Retail, Financial Services and B2B verticals. Deva also spent three years on the client side within the KFC Corporation and was responsible for the development and launch of the brand’s digital marketing discipline.

David is a 20-year industry veteran and a homegrown Horizon talent. He oversees all of Horizon’s media investment across media types. David created and leads Horizon Advanced, a dedicated team focusing on bringing advanced data to TV and how data can impact linear and OTT video buying. David works hand in hand with Horizon’s data solutions practice to bring advanced targeting and technology to all of Horizon’s investments and is actively breaking down buying silos towards true omnichannel planning and buying. David has already garnered some of the industry’s top honors, including winning a Mediaweek All-Star Award as well TV Week’s Buyer of the Year in 2019.

David Cohen joined IAB in April 2020 as President and was named Chief Executive Officer in September 2020. Cohen is a widely respected advertising agency leader who, prior to IAB, served as President, North America for MAGNA, Interpublic Group’s (IPG) centralized media intelligence, investment, and innovation arm. In this role, Cohen was responsible for more than $20 billion in media spend. During his tenure, Cohen structured and executed large global transactions on behalf of IPG and its clients, with such major IAB member companies as Facebook, Google, Microsoft, Spotify, Twitter, and Verizon Media.

Prior to MAGNA, Cohen served as Chief Investment Officer of UM, ensuring that digital innovation, data, and technology acumen flowed throughout the agency to drive performance. From 2001 to 2011, Cohen served in critical, transformational roles at UM during the explosive growth of digital advertising, including Chief Media Officer, Chief Digital Officer, and Executive Vice President, U.S. Director of Digital Communications. In the late 1990’s, Cohen was responsible for launching and building IPG’s digital practice.

Cohen has a long history of working with trade organizations including IAB and 4As, where he served as chairman of the Interactive Marketing Committee from 2009-2013. He has also been instrumental in initiating several vital industry-wide programs, including the Future of Television, facilitated by EY. Cohen is a Queens native, with a bachelor’s degree in communications from Adelphi University. He was recognized by Adweek as a “Media All Star” and was part of the “Adweek 50” in 2012.

In 2016, David was elected to the Board of Directors of Partnership with Children a non-profit whose mission is to strengthen the emotional, social, and cognitive skills of vulnerable children in New York City to help them succeed in school, society, and life.

David enjoys spending time with his wife and two teenage daughters. A self-described gadget-geek and sometimes fitness fanatic – he ran the NYC Marathon in 2014 and 2019 and Boston Marathon in 2016.