Yeah, suuuuure he understood the job.
"The Times story has this key quote from Perry 2016 adviser Michael McKenna: "If you asked him on that first day he said yes, he would have said, 'I want to be an advocate for energy. If you asked him now, he'd say, 'I'm serious about the challenges facing the nuclear complex.' It's been a learning curve."
http://m.newser.com/story/237105/perry-took-energy-post-didnt-realize-gist-of-job.html
It's also hilarious that he wants to head the department that he wanted to get rid of AND couldn't remember!