Replying to designing terrain parks, for a career

Now, I know most of you wont be able to help me out here. But there has to be someone here that knows.
The way I see my life going is that I want to design terrain parks for a job. You know for a mountain and stuff.
Is there any sort of education I could major in college for this? Or is it a job where you start out low, and if you prove yourself, you keep moving up higher?
Any information would help, at this moment I have yet to talk to one person who knows whats up.