Yahoo! ( YHOO) named Henrique de Castro as its chief operating officer after Monday's close. A direct report to Yahoo! CEO Marissa Mayer, de Castro most recently served as vice president of Google's ( GOOG) worldwide Partner Business Solutions group. The company said de Castro is expected to join Yahoo! in late January or "as soon as he has satisfied his obligations to his current employer." "Henrique is an incredibly accomplished and rigorous business leader, and I'm personally excited to have him join Yahoo!'s strong leadership team," said Mayer said in a press release. "His operational experience in Internet advertising and his proven success in structuring and scaling global organizations make him the perfect fit for Yahoo! as we propel the business to its next phase of growth." Yahoo! shares rose 8 cents to $15.76 in late trades, while Google's stock was off 23 cents at $740.75. -- Written by Michael Baron in New York. >To contact the writer of this article, click here: Michael Baron.