There is conflicting information concerning the posting period and Dooley, and how it pertains to Gruden.
Even though somebody said that it didn't pertain to the coaching positions, somebody I spoke with that worked in HR at another state school said that they actually did have to post the position previously, but they didn't know if that had changed since they left.
My understanding of how the Dooley deal went down is that the position was posted AFTER he signed an MOU, but BEFORE he signed his final contract, which was 3 months later.
I know for a fact that this is how many coaches are hired, but I do not know if things are different at UT now.
Like Slice, I was unable to find anything definitive about coaching jobs, but I did find this article which will be VERY interesting to everybody. I highly recommend you read it:
"Art of hiring a college football coach"