Facts: - president: barack obama - birth name: john victor roos - order: 28th - successor: caroline kennedy - predecessor: tom schieffer - country: japan - term end: august 12 , 2013 - term start: august 20 , 2009 - birth date: 14 february 1955 - name: john roos - image: johnroos.jpg - birth place: san francisco , california , u.s. - alma mater: stanford university - ambassador from: united states Based on these bullet points, write a short biography describing the life of john roos .
john victor roos -lrb- born february 14 , 1955 -rrb- is a former united states ambassador to japan and former technology lawyer .before accepting the ambassadorship from president barack obama , roos was the ceo of silicon valley-based law firm wilson sonsini goodrich & rosati .