CIOs who are excited about their jobs and who are ambitious often like to act like they know everything.  

This kind of behavior becomes very visible to everyone that they work  with. As they move on in their career, these CIOs often start to realize  that, despite the importance of information technology, just how little  they actually did know. Acting this way can be a severe career limiter  for CIOs. 

What we need to do is to understand what it looks like when we  are acting like a know-it-all and what we can do to stop this kind of  behavior.