This is a HR company dealing mainly with corporate culture. That is another way of saying that this is a firm that deals with your company. If you think about it you'll find that no problems and no factors of success are void of human input. Humans control every aspect of your company, and humans comes with culture.
So you have culture to deal with, but how important is it?
The culture of individuals and groups consist of the values and attitudes of the involved parties. These are the corner stones of who we all are as human beings. They dictate what we do and how we do it.
What we do and how we do it? Sounds important. Looking at your own company, are you allocating attention to this area in proportion to its importance?