The search for a new COO at Uber is going to be one of the more high profile engagements completed this year, I suspect.  As the article suggests, the current CEO - Travis Kalanick -  is likely to stay with distance at the San Francisco based firm, but perceptions of the start up could change significantly based on this hire.  Will Heidrick be able to find a candidate strong enough to take the role yet willing to be a number 2?  No doubt it will be all over the press for the next couple of months as they find out!