In his new role, he will concentrate on providing with consumer research insights to help drive product innovation and development, better marketing and media sales.
He will report to Cammie Dunaway, Yahoo!'s chief marketing officer, and be based at its headquarters in Sunnyvale, California.
Daboll was previously chief executive of ComScore Media Metrix, the internet audience measurement firm. He has also served as chief operating officer of the consumer research company MarketTools and was chief operating officer of Advertising.com.
Dunaway said: "Hiring someone of Peter's calibre underscores Yahoo!'s continuing commitment to constant consumer focus. Ongoing communication with Yahoo!'s millions of users gives us an advantage in understanding global user behaviour and market momentum. Peter's addition to the team will help us utilise these insights even more effectively."
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