well im going into construction and just wondering if i need a heavy equipment license to operate these all the time or just on certain jobs and if just certain jobs what kind and how do i get my license like would i need one to rep down a house
No, i know you only need to take a small course (like a couple weeks probably) to use an excavator, and i imagine its the same situation for the skidder.
Yes. If you use such equipment without one, you are liable for prosecution.