Deputies are second in command empowered to act in their superiors’ absence. Chiefs of staff give their leaders increased leverage by managing them, priorities, programs and projects, and communication. Each is important in their own right. Not all leaders fill either or both positions. Don’t be fooled by titles as those acting as deputies or chiefs of staff may have a very different title. And few people with the title “Vice President” are actually deputies – including the Vice President of the United States.