In every organization, there are people who have formal and informal authority. The folks with formal authority are fairly easy to spot. They usually have the biggest office, fanciest clothes, and sit at the head of the table. Spotting the ones with informal authority can be a little trickier. Sometimes they are more vocal and aggressive. Other times they are silently controlling the tides from behind the scenes in your organization. Either way, it's one of your key responsibilities as a change agent to identify these people and leverage their influence to drive change.