Los Angeles—NetSeer, a start-up company focusing on advertising search technology, Wednesday announced that Greg Coleman has joined the company as president-CEO. He succeeds interim CEO Vwani Roychowdhury. Coleman was most recently exec VP-global sales at Yahoo. Before that, he was president of Reader’s Digest. NetSeer, founded in 2006, said it will disclose more about its technology and offerings by the end of the year.