Holly Dewsbury

Principal, Global Agency Development

Holly stands as a distinguished leader at the intersection of technology and Media, with a proven 15-year track record of driving transformational change across the industry's most influential organizations. Her strategic vision has consistently advanced the evolution of Media, particularly through leadership roles at X, Meta, and currently as Principal of Global Agency development at Amazon Ads.

Her expertise in forging global partnerships has established new industry benchmarks, particularly in the integration of Media, technology, and creative disciplines. Under her leadership, these partnerships have delivered exceptional value for some of the world's most prominent brands, such as Colgate, Danone, and L'Oréal. Holly has lead the Pioneering Amazon's Agency Accelerator programs, elevating professional development standards across the industry and in 2025 helped to shape the brief that won a 2025 Cannes Lion award for Commerce Innovation through groundbreaking work with Kleenex 'Tear score'. During her time at Meta she Architected the prominent Agency OS framework, revolutionizing the agency partnership model through a unified value-based program. Holly's approach to partnership development has consistently demonstrated measurable impact on both commercial outcomes and Media industry advancement. Her ability to align strategic objectives across complex stakeholder groups has resulted in innovative solutions that drive mutual growth and set new standards for excellence in Media. Through her leadership, she has consistently demonstrated that when media, technology, and creativity converge effectively, they create unprecedented value for all stakeholders while advancing the industry as whole.