Entrust Technologies President, CEO Resigns

Entrust Technologies

(ENTU)

said Monday that John Ryan has resigned as president and chief executive, effective immediately.

Board member Alberto Yepez, the president of

Entrust New Ventures

, and David Thompson, the company's chief financial officer and executive vice president, will act as co-chief executives while Entrust looks for a permanent replacement for Ryan.

Ryan is leaving the Internet infrastructure software and products company for "a new challenge," he said in a statement.

Shares of Entrust fell 32 cents, or 2.2%, to $14.13 in regular session

Nasdaq

trading, but slipped to $12.50 in recent after-hours

Island

activity.