> Also, you can't work for the feds if you ever touch the ganja, which is ridiculous

I believe it is possible to get security clearance after cessation of drugs for multiple years, even drugs like Heroin. I found the full rules[0] while reading an AMA on /r/SecurityClearance.

[0] https://www.dni.gov/files/NCSC/documents/Regulations/SEAD-4-...