Clearspring today announced the appointment of Ramsey McGrory to the position of chief operating officer. McGrory formerly led Right Media, Yahoo’s U.S. digital advertising exchange and data business. He replaces Clearspring founder Hooman Radfar, who will assume new responsibilities as executive chairman. Ted Leonsis, who previously held that role, will remain on the company’s board of directors.

McGrory (pictured) had been with Right Media since the $1 billion annual revenue business was a startup, back in 2004, and most recently held the title vice president, North American Marketplaces, Yahoo. “His deep understanding of advertising and data, coupled with a demonstrated ability to deliver value to publishers, advertisers and consumers make him an invaluable addition. Together with our already impressive team, board and investors, we’re confident that this move will help us continue our fantastic growth by better serving our customers,” Radfar wrote on the company’s blog.

Clearspring in May raised $20 million in Series D financing, bringing its total funding to $80 million. Its AddThis platform enables publishers to distribute and track digital content such as web pages, widgets, and videos to social networks, bookmarking sites, blogs and more. It is used by over 9 million publishers, reaching more than 1 billion people worldwide, and Clearspring’s Audience Platform aggregates the data it collects by influence, interest and intent in real-time.

The company recently enabled the integration of Audience Platform with major demand-side platforms, including WPP’s Media Innovation Group, Invite Media, MediaMath, DataXu, Turn and Yahoo’s Right Media Exchange.

Clearspring investors include Institutional Venture Partners, New Enterprise Associates, Novak Biddle Venture Partners, former AOL vice chair and president Ted Leonsis, AOL co-founder Steve Case, Capital One co-founder Nigel Morris and Silicon Valley angel Ron Conway.

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Clearspring’s blog post –