Amazon executive Jeff Blackburn speaks at his alma mater, Dartmouth College, in 2015. (Dartmouth / Eli Burakian Photo, used with permission.) Another Jeff is moving on from his longtime Amazon executive role, filling out the picture of what has become a massive leadership transition at the tech giant. Jeff Blackburn, the senior vice president who played a key behind-the-scenes role as one of Jeff Bezos’ top lieutenants for more than two decades, is leaving Amazon as of today, following a year-long sabbatical, he wrote in a message to Amazon’s senior leaders, posted to the company’s intranet and obtained by GeekWire. […] More