Liam Brennan
President at LiveRamp
Scaling LiveRamp's identity resolution infrastructure — particularly RampID and ATS — into industry-standard solutions for post-cookie addressability and privacy-safe data collaboration.
Last updated May 31, 2026 by the ATDb Editorial Team
Liam Brennan is one of the most operationally significant figures in modern AdTech, serving as President of LiveRamp — the identity resolution and data collaboration platform that has become foundational infrastructure for the digital advertising industry. As the ecosystem grapples with the deprecation of third-party cookies and tightening privacy regulations, Brennan has positioned LiveRamp as the connective tissue enabling brands, publishers, and platforms to activate data in compliant, interoperable ways. His leadership has been central to scaling RampID and the Authenticated Traffic Solution (ATS) into widely adopted identity frameworks across the open web. Brennan's career has been defined by a deep focus on data-driven marketing and the technical plumbing that makes addressable advertising possible. Prior to his current role, he held senior leadership positions that built his expertise in programmatic infrastructure, data partnerships, and platform strategy. At LiveRamp, he has overseen a period of significant commercial and technical expansion, forging integrations with major publishers, DSPs, SSPs, and measurement providers to create a more interoperable identity ecosystem capable of functioning without third-party cookies. Beyond internal operations, Brennan is a recognized voice in industry conversations around privacy-safe identity, data clean rooms, and the future of addressable media. He engages regularly with trade bodies and industry consortia, contributing to the standards and frameworks that will define how digital advertising operates in a more privacy-constrained environment. His influence spans both the technical and commercial dimensions of AdTech, making him a rare operator who bridges engineering complexity and go-to-market strategy.
Senior Vice President
LiveRamp
Vice President
LiveRamp
- Led LiveRamp's scaled adoption of RampID as a cross-ecosystem identity alternative to third-party cookies
- Drove publisher and platform partnerships for the Authenticated Traffic Solution (ATS), expanding its reach across the open web
- Positioned LiveRamp as foundational infrastructure for data collaboration and identity resolution in a post-cookie advertising environment