Skip to content
ATDbbeta
LB

Liam Brennan

Operator

Liam Brennan is Managing Director of The Responsible Marketing Agency, which helps brands, agencies and publishers meet environmental, social and governance goals. He has nearly two decades in media and marketing, joining from WPP's EssenceMediacom — where he launched and led the Blink Consulting digital-transformation practice — and earlier held senior roles at MediaCom, Publicis's Starcom and Dentsu's Carat. He judges the World Media Group awards and contributes to Ad Age.

Last updated Oct 18, 2026 by the ATDb Editorial Team

Role
Managing Director
Company
The Responsible Marketing Agency
Based
San Francisco, California, United States

AI-drafted from public sourcesno sources yet

Years in industry
15 years

Bio

Liam Brennan is Managing Director of The Responsible Marketing Agency, which helps brands, agencies and publishers meet environmental, social and governance goals. He has nearly two decades in media and marketing, joining from WPP's EssenceMediacom — where he launched and led the Blink Consulting digital-transformation practice — and earlier held senior roles at MediaCom, Publicis's Starcom and Dentsu's Carat. He judges the World Media Group awards and contributes to Ad Age.