AOL’s Shashi Seth Quits After Just Three Months

Shashi Seth, the guy AOL hired in September to bring order to its sprawling family of ad products, is leaving the company to accept an unspecified role at Yahoo. (Update 1/14: Yahoo announced Seth’s hire as SVP of its search products team.)

In a letter to employees, Seth cited family reasons and apologized for taking leave so unexpectedly. The move represents a setback for AOL, which had looked to him to integrate and revamp its divergent ad platforms — including Advertising.com and its mobile, behavioral targeting, and rich media ad operations.

“While Shashi was only with us for 90 days, we appreciate the early steps he took to help us redefine AOL’s advertising product roadmap,” Jeff Levick, AOl’s president of global advertising and strategy, wrote in a memo to employees obtained by ClickZ.

Levick named Jamie Fellows as interim head of AOL’s global ad products group.

Among his duties was the development of a self-serve ad buying system for AOL inventory, first reported by ClickZ in July. He also had global oversight of Advertising.com and the company’s other display ad products.

Interestingly, the guy Seth replaced at AOL, 14-year vet Eric Bosco, landed a new gig today, as chief product officer at comScore.