Jonnie Cahill

Jonnie Cahill has earned a distinctive reputation in the AdTech ecosystem as one of the rare advertiser-side executives willing to speak candidly and publicly about the dysfunction embedded in programmatic media buying. During his tenure as CMO of Heineken USA, he leveraged the brand's significant media budget to demand greater transparency, supply path optimization, and measurable accountability from DSPs, SSPs, and publishers — making him an influential voice not just in marketing circles but across the entire programmatic supply chain. His philosophy of prioritizing quality environments over cheap impressions placed him at the forefront of the industry's reckoning with Made for Advertising (MFA) sites, ad fraud, and wasteful long-tail inventory. Calhill was a vocal participant in industry conversations surrounding the ANA's landmark programmatic transparency studies and the broader movement among major advertisers to reduce wasteful spend and sharpen the signal-to-noise ratio in digital advertising. His AdTech literacy — encompassing the technical underpinnings of media buying, not just the marketing surface — allowed him to hold vendors accountable in ways that many brand-side executives historically could not. This positioned him as a model of the modern, technically fluent CMO who bridges creative brand strategy and performance media rigor. In April 2025, Cahill departed Heineken USA to join PepsiCo as SVP & Chief Marketing Officer, International Foods, bringing his demand-side accountability philosophy to one of the world's largest consumer goods companies. His Irish background and international career experience inform a global perspective on brand building, while his new platform at PepsiCo gives him an even larger stage to influence how major consumer brands engage with and reshape expectations of the programmatic ecosystem.

Last updated Jul 10, 2026 by ATDb automated enrichment · Connections updated Jul 15, 2026