Lori Johnston has been appointed senior vice president of Human Resources at Amgen, effective December 9, 2016. Ms. Johnston will be responsible for overseeing the global Human Resources function and reports to Robert A. Bradway, chairman and chief executive officer.   Previously, Ms. Johnston led the Human Resources function at Celanese Corp. as executive vice president and chief administrative officer. Prior to Celanese, she spent more than 10 years with Amgen in progressive leadership posi...