I have.... Glad to hear that you have left that life behind and not allowed it to take over your life, unlike so many others. It will take some patience and dedication to overcome the demons in one's past when drugs are involved, but it can be done.

Any history of drug use is pretty much a guaranteed disqualifier for any federal agency.  I understand that marijuana expermentations yearrs in the past will let you start the process with some federal agencies, but I suspect that the drug experimentation would DQ you for candidates that have no history, most federal positions are extremely competitive, and of course, only the best are chosen.

Each agency and/or department sets their own standards, so there is no blanket answer unfortunately. And then how the administration interprets and handles the policies is also somewhat influenced by personal opinion. So, like you said, you will have to see what the department you are applying for has to say.