Omnicom Advertising Group (OAG)
Denis Streiff is an experienced finance executive currently serving as Chief Financial Officer at Omnicom Advertising Group since January 2025, following a long tenure at TBWA where Denis held the positions of Chief Financial Officer and Chief Financial Officer International from November 1998 to January 2025. Prior to that, Denis held the role of Assistant Treasurer at Omnicom Group from March 1994 to October 1998 and began their career as an International Tax Lawyer at CMS Bureau Francis Lefebvre from January 1988 to February 1994. Denis holds a Master in Management with a focus on Business/International Tax from HEC Paris, as well as a Master in Law and a DESS in International Tax and Law from Paris-Pantheon-Assas University. Their foundational education includes a preparation program at Lycée Sainte-Geneviève.
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Omnicom Advertising Group (OAG)
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OAG is made up of the world’s most recognized creative agencies. With a mission to attract and support wildly creative talent and an enviable list of clients, OAG provides the bedrock from which the very best ideas can grow. We speed innovation by embracing tools, capabilities and technologies that deliver culture-defining creative experiences to drive growth and fame. We are a collective of 20,000 creative minds in 40+ countries who are steadfast in our belief that creativity can solve the world’s problems.