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Senior Appointments for Nielsen

March 24 2026

Nielsen has announced three senior appointments adding support for sports advertising and publishing clients. Seth Ladetsky joins as Head of Global Sports, and Trevor Fellows to lead advertiser and agency relationships. Fellows replaces Matt Devitt who moves to oversee national publisher accounts.

Seth Ladetsky, Trevor Fellows and Matt DevittLadetsky (pictured top) has spent nearly three decades at Turner Broadcasting, joining as a Sales Assistant for CNN in the 1990s, and most recently working as SVP Sales and Head of Turner Sports Digital, driving revenue growth across Turner Sports and Warner Bros. Discovery and managing more than $2 billion in advertising and sponsorship revenue.

Fellows (pictured middle) joins to oversee advertiser and agency, following a year when the company has announced audience integrations with WPP Media, Horizon Media and IPG's Acxiom, and has launched a new Outcomes Marketplace, including integrations with Realeyes an Adelaide. Fellows was previously EVP, Digital Sales and Partnerships for NBCUniversal, and earlier managed teams and revenue at Bloomberg, The Wall Street Journal, and NBCUniversal.

Devitt (pictured below), whose new title is Head of National, has led the growth of Nielsen's Advertiser and Agency business in the US, including new long-term partnership agreements for Nielsen Big Data + Panel and Streaming with seven of the largest global agencies. Earlier he worked in digital product sales and strategy across the company's major enterprise clients; and he worked at NIQ on the development and delivery of CPG and Retail analytics products.

All three report to Amilcar Perez, Chief Revenue Officer for Nielsen Global Audience Measurement, who comments: 'The skill sets of Seth, Trevor and Matt are extremely complementary and driven by their passion to innovate for partners. 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.'

The firm is online at www.nielsen.com .

All articles 2006-23 written and edited by Mel Crowther and/or Nick Thomas, 2024- by Nick Thomas, unless otherwise stated.

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