Corporate Cultural Analyst?

Today, I had an idea. As I was talking with one of the IT technicians at work, he was explaining how the corporate culture at this company doesn't foster free speech. In fact, its just the opposite. It often discourages speaking clearly and blatantly.
This statement got me thinking. And I realized that I find the culture of this company much more interesting than the work I do there. I've always been interested in watching people, and observing how they interact together. I've often said that if I could go through college again, I would major in Sociology.
But that statement is silly. I'm only 23; I still have the ability to go and learn and do what I want to.
So I think I'm going to look into some sort of Master's program in Sociology or something similar. If you know anything about the study and the field revolving around culture and human interaction, corporate or otherwise, let me know. I'd like to mind map out a network of people and organizations.
My thoughts are rather disorganized right now; its late, and I just figured this out today. More concise thoughts to come.