Ronald David Harker, OBE, formerly chief exec, Citizens' Advice, for serv the voluntary sector.
With little national security experience of his own, Mr. Obama has leaned heavily on the holdover Pentagon chief for advice, aides said.
Google Ad chief Susan Wojcicki has some advice for Web companies wondering if their products will be a success.
In addition to placing a number of high profile IT executives, she also writes about hers and many other placements for CIO magazine together with advice for chief information officers everywhere.
Keith Bradsher, the Hong Kong bureau chief for The Times, offers some advice for those shoppers who want to go straight to the source.
"Never trust anyone over 30", the rallying cry of the hippies, has become sage advice for any chief executive staffing his dot.com spin-out.There have been youth revolutions before, from 20s flappers to 50s rock'n'roll to 60s radicalism, but none of them made the leap from teen bedroom to boardroom the way the Internet has.
Who's hot or not, in or out, and tips and advice for the chief executive.
Serwer, Yahoo Finance's editor-in-chief, added a piece of advice for the younger generations: "Get real, work hard, and don't spend money.
Brandon Holley, the editor in chief of Lucky magazine, shares her advice for climbing the masthead at a magazine.
He retold a Steve Jobs interview where the Apple chief executive had been asked for advice for entrepreneurs.
