The company expands leadership team under Chief Revenue Officer Amilcar Perez
Seth Ladetsky is Head of Global Sports; Trevor Fellows, Head of Advertiser/Agency; and Matthew Devitt Promoted To Head of National
New York - March 24, 2026 - Nielsen, a global leader in audience measurement, data and media intelligence, today announced the appointment of three strategic senior hires to continue the company's next phase of market leadership.
Effective today, Seth Ladetsky has been named Head of Global Sports. Trevor Fellows will lead Nielsen's advertiser and agency relationships. Matt Devitt, who most recently held the advertiser and agency role, will now oversee Nielsen's national publisher accounts for leading media companies.
All three will report to Amilcar Perez, Chief Revenue Officer, Nielsen Global Audience Measurement.
The skill sets of Seth, Trevor and Matt are extremely complementary and driven by their passion to innovate for partners, Perez said. Nielsen has become a one-stop-shop for our clients, fueling every part of the media process from planning to measurement and outcomes. These leaders will help drive growth for clients and Nielsen as the industry's media intelligence leader.
More info about each of these senior leaders is below.
Seth Ladetsky Head of Global Sports
As Head of Global Sports, Ladetsky will continue charting Nielsen's course as the ultimate source for sports measurement and media intelligence. He most recently served as SVP, Sales and Head of Turner Sports Digital, where he spent nearly three decades driving revenue growth across Turner Sports and Warner Bros. Discovery. During his tenure, he oversaw properties including NBA Digital, NCAA March Madness Live, Bleacher Report, NASCAR Digital, PGA Digital, and all Turner sports streaming on HBO Max. He has managed more than $2 billion in advertising and sponsorship revenue. Ladetsky brings significant expertise in go-to-market strategy, high-value partnerships and uncovering new revenue streams.
Trevor Fellows, Head of Advertiser/Agency
Fellows will helm advertiser and agency relationships at Nielsen. His appointment follows a strong, innovation-filled year for Nielsen on the buy side. In the last year alone, Nielsen announced advanced audiences integrations with WPP Media, Horizon Media and IPG's Acxiom, as well as the launch of a new Outcomes Marketplace - a solution that is available to buy-side clients - that it has expanded via integrations with Realeyes and Adelaide. Fellows previously served as EVP, Digital Sales and Partnerships for NBCUniversal. Fellows has spent his entire career in media and advertising across all forms, from TV through digital, print, radio, social and events. Through his career, he has managed complex global teams and significant revenue at Bloomberg, The Wall Street Journal, and NBCUniversal, with a focus on helping clients use new technologies and methodologies effectively and efficiently.
Matt Devitt, Head of National
Devitt most recently led Nielsen's Advertiser and Agency business in the U.S. Under Matt's leadership, Nielsen stabilized and grew its agency business, including new long-term partnerships for Nielsen Big Data + Panel and Streaming with seven of the largest global agencies. Prior to that role, he spent multiple years leading digital product sales and strategy across Nielsen's largest enterprise clients. He was formerly a leader at NIQ, working on the development and delivery of CPG and Retail analytics products for brands.
In his new position, he will oversee Nielsen's relationship with national clients, including the world's largest media companies.
About Nielsen Nielsen is a global leader in audience measurement, data and analytics. Through our understanding of people and their behaviors across all channels and platforms, we empower our clients with independent and actionable intelligence so they can connect and engage with their global audiences-now and into the future. Learn more at www.nielsen.com and connect with us on social media (X, LinkedIn, YouTube, Facebook and Instagram).
Media Contacts: David Schwarz David.Schwarz@nielsen.com
Elaine Wong elaine.wong@nielsen.com
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The company expands leadership team under Chief Revenue Officer Amilcar Perez
