Thousand Oaks-based Amgen said Thursday evening that it has added Robert A. Bradway, the firm's current President and Chief Operating Officer, to the company's board. According to Amgen, the addition of Bradway brings its total board members to 13. Bradway has been at Amgen since 2006, and previously also served at Morgan Stanley. Bradway has been President and COO of the firm since May of 2010.