Kirk McDonald

Kirk McDonald is one of the most seasoned executives bridging the worlds of premium publishing and programmatic advertising technology. As CEO of GroupM Nexus, the addressable content and commerce division of GroupM, he oversees the adtech infrastructure, data partnerships, and commerce capabilities that underpin advertising for some of the world's largest brands. His leadership at GroupM Nexus positions him at the center of the industry's most pressing challenges: identity resolution in a post-cookie world, the growth of retail media, and the evolution of programmatic buying at scale. McDonald's career reflects a rare ability to operate effectively on both the buy and sell sides of the digital advertising ecosystem. Before GroupM, he served as President of PubMatic, a leading independent sell-side platform, where he helped sharpen the company's market positioning and accelerate its growth during a critical period of consolidation in the SSP landscape. Prior to that, he spent years at Time Inc. in senior leadership roles including President of Advertising, where he guided one of the most storied legacy media companies through the turbulent transition to digital-first advertising models. With over two decades in the industry, McDonald is recognized as a thought leader on programmatic advertising, publisher monetization, and addressable media. He is a frequent presence at major industry conferences and has been a consistent voice on topics ranging from the future of the open web to the role of data transparency in rebuilding advertiser trust. His experience across publishers, platforms, and holding companies gives him a uniquely holistic perspective on the structural forces reshaping digital media.

• Led GroupM Nexus as CEO, overseeing adtech infrastructure and programmatic capabilities for the world's largest media investment company
• Served as President of PubMatic during a key growth and market-positioning phase for the independent SSP
• Guided Time Inc.'s advertising business through digital transformation across an iconic portfolio of media brands