John Montgomery is COO of GroupM Interaction in North America. Montgomery joined Ogilvy in 1989 in South Africa as media director, and launched Mindshare in that country. In the final three years he spent in South Africa, he was managing director of the Ogilvy Group in Cape Town, one of the most creative agencies in the Ogilvy Worldwide Network. In 2001, Montgomery moved to Amsterdam as CEO, Ogilvy Group Netherlands.


In 2004, Montgomery relocated to New York to lead the interactive media practice for Mindshare and Ogilvy, and was subsequently appointed as global CEO of Mindshare Interaction in 2006, where he established the digital practice for Mindshare worldwide.



In 2009, he took on the role of COO of GroupM Interaction for North America, where he leads the digital data strategy, innovation, and policy for the group. Montgomery is seen as one of the digital innovators in the field and speaks regularly on issues like programmatic buying, data strategy, privacy, and digital trading. As part of his role, Montgomery has represented the advertising industry to the U.S. Senate Commerce Committee and is on the internet steering committee for the WEF. Montgomery is chairman of the 4A's Media Leadership Council.

Summits Attended

iMedia Agency Summit

Media Re-Defined -- What Clients Want

iMedia Agency Summit

Partnership: The New Agency Value

iMedia Agency Summit

Navigating Digital's Ever-Evolving Future

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