Nielsen Holdings named Steve Hasker global president and chief operating officer, effective Jan. 1.

Hasker, who had been global president, will continue his existing responsibilities for Nielsen’s U.S. media business and oversight of its consumer and media product teams. He is adding oversight of Nielsen’s Watch and Buy segments globally.

“Steve has made significant and crucial contributions to our business—the most recent of which is his stewardship of our Total Audience framework,” said Mitch Barns, CEO of Nielsen.

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