Amazon CEO Andy Jassy has tapped one of the company's top marketplace executives to be his new "shadow" advisor, the company announced Wednesday. In a blog post , Amazon said Dharmesh Mehta, vice president of worldwide selling partner services, will become Jassy's technical advisor in March. Amazon said Amit Agarwal, its senior vice president of international stores, will take on Mehta's responsibilities as part of an expanded role that will also include its customer trust teams. The role of