This may not be true for all states, but for mine there is a requirement to essentially work for/with multiple PE's who will then sign off on your experience. As an NLO that may be challenging to get. At least a couple of the Shift Managers at my plant have PE licenses, so you may have been on a crew with a PE and not even known it. I recommend calling your state's technical profession board to get the most accurate answer.
Disclaimer: I don't have my PE yet so I'm going off of info we were given in school prior to taking the FE exam a couple of years ago.