Though they are unable to speak, ants certainly have a lot to say. They have evolved to communicate subtly with one another in a way that helps them structure their colonies into a complex social system. These communications range greatly but at their core they all have the common goal of ensuring a stable colony.
Ants, as well as being one of the most group-based, clever, problem solving insects are also well known for using pheromones to communicate and follow each other. I believe that ants could be able to change the way they emit these chemicals and pheromones as a way of 'communicating' with their peers.
Yes, ants are able to use communication skills in order to organize their colonies. Not all communication is verbal. Animals and insects use a variety of different types of signals to communicate with other members of their species, including pheromones, lights and other such things. While humans may not think about these things as communication, they are.
Yes, ants probably are able to use communication skills to organize their colonies. The fact that ants do not communicate in the same way that people do does not mean that they do not use communication skills to communicate in some way. The y live in colonies so they have to communicate.