Ed Skyler took on his new position at Citigroup in early May after high-profile spells working with Michael Bloomberg, first at the New York City mayor's eponymous media firm, then as deputy mayor in the Big Apple. Now, reporting directly to Citigroup CEO Vikram Pandit, the youthful Skyler, 37, is charged with leading internal and external communications, as well as contributing heavily to government affairs and investor relations. It's a challenge he will no doubt relish, as it enables him ...