At Snowflake Summit 2026, Dennis sat down with Sherene Hilal, Chief Ad Product and Technology Officer at SiriusXM, for a conversation on how audio and marketing data platforms are evolving together. The discussion covers the shift toward unified, governed data foundations, how AI is changing planning and measurement, and what composable infrastructure means for major media companies navigating first-party data at scale. It's a candid look at how one of audio's biggest platforms is rethinking its data and ad tech strategy in an AI-driven landscape.

In this AdExchanger column, Dennis argues that the real disruption from AI in ad tech isn't automation — it's access. As AI systems move from generating insights to planning and executing decisions, control shifts away from platforms built on scarcity and opacity toward more open, composable ecosystems. He explains why standards battles are premature, how consolidation is accelerating, and why the winners will be organizations that enable governed data access and shared measurement rather than hoarding it.

Speaking with The Drum at IAB ALM 26, Dennis — who previously led IAB Tech Lab — argues AI agents will reshape media buying, data strategy, and the adtech ecosystem faster than programmatic or mobile ever did. He discusses Snowflake's AI Data Cloud approach, the rise of agent-to-agent media buying, the opportunity for publishers to better activate first-party data, and the risk AI-driven automation poses to adtech and martech vendors that don't move up the value chain.

On the Modern Marketing + Measurement podcast, Dennis breaks down how a unified data foundation, composable technology, and emerging AI capabilities are reshaping how brands plan, activate, and measure media. The conversation covers the shift away from monolithic marketing stacks toward conversational data access and agent-driven workflows, plus a clear-eyed take on what real data ownership, privacy, and agility look like in an industry moving faster than ever.

On the Business of Marketing podcast, Dennis — who brings experience from Yahoo, Microsoft, Meta and IAB Tech Lab — unpacks the future of data, AI, identity and measurement in advertising. The conversation explores what the next era of advertising will look like as marketing technology stacks become more composable and data-driven, and how brands can prepare their data and measurement strategies for an AI-first landscape.

Fresh off Advertising Week NY, Dennis writes about the decline of the monolithic “one-stop-shop” platform and the rise of composability — assembling a marketing and media stack from best-of-breed applications that operate directly on your data. Drawing on a panel with leaders from GrowthLoop, dentsu, Snap and Newton Research, he outlines why adaptability is now a competitive edge, how an AI-ready data layer unifies decision-making, and why composability ties directly to ROAS and customer lifetime value.

At Cannes Lions, Dennis joined “Data Cloud Now” anchor Ryan Green shortly after being named Snowflake's Global Head of Advertising, Media and Entertainment. They discuss data connections, data security, and the disruptive impact of artificial intelligence, along with why organizations need to rigorously assess their data assets to identify gaps, compliance issues, and opportunities for enhancement as they prepare a solid data foundation for what's next.

Critical advertising use cases -- including remarketing, attribution and incrementality, and audience segmentation -- can be satisfied with Privacy-Enhancing Technologies and other privacy-forward practices. This explainer can help you understand the differences between historical and more durable approaches.

To motivate your company to adopt privacy-forward technologies and solutions for advertising, you first need to understand the impact identity signal loss may have on your business. This explainer helps you do just that.

In part two of his conversation with Alan Chapell on The Monopoly Report, Dennis discusses the future of addressability and how the industry can create ad standards that are both principled and fair. The two also question the ongoing value of legacy adtech infrastructure as privacy-enhancing technologies and new standards reshape how the industry approaches identity and measurement.