Global Consulting CMO at EY
Advising enterprise brands and media companies on marketing transformation and AdTech strategy at a global consulting scale, particularly around data-driven marketing and privacy-compliant advertising.
Last updated Feb 27, 2026 by AI Enrichment
Deborah Byers is a senior marketing and advertising technology strategist serving as Global Consulting CMO at EY (Ernst & Young), where she leads the firm's marketing consulting practice for a global client base spanning Fortune 500 brands, agencies, and media companies. Her work centers on helping organizations navigate the rapidly evolving intersection of marketing, data, and technology — including programmatic advertising, customer data platforms, marketing analytics, and privacy-compliant marketing strategies in a post-cookie landscape. With over two decades of experience spanning marketing operations, digital transformation, and advertising technology implementation, Byers brings a practitioner's perspective to enterprise consulting engagements. She has advised organizations on modernizing their marketing capabilities, optimizing advertising investments, and building data-driven marketing organizations that can operate effectively amid tightening privacy regulations and shifting consumer expectations. At EY, Byers sits at the convergence of management consulting and marketing technology, helping clients align their MarTech and AdTech stacks with broader business transformation goals. Her reputation in the industry is built on translating complex technology and regulatory shifts — such as identity resolution changes and first-party data strategies — into actionable frameworks for large organizations.