Invisible leaders are a plague in many organisations. This article illustrates the damage they can do: https://goo.gl/DsZgy5
As it notes, such 'leaders' tend to be good at 'flying under the radar'. If you are an executive or other senior leader, it is important that you proactively seek to identify and remedy any such situations.
If you fear the article is describing you, don't despair: get in touch and let Aspire help you become the leader you really want to be!