The use of illegal drugs (under Federal law) is a sure-fire way to lose eligibility for a security clearance, especially if you already have one. All clearance holders get a security briefing about their responsibilities, acceptable conduct, and reporting requirements. Most take it to heart and toe the line. Others, well…read an interesting case summary here…
I have an employee waiting on adjudication now for a onetime use of. So he claims. Time has passed, he sat for 2 Poly’s and an interview. It will be interesting to see what happens with this one. I absolutely agree the deception and only revealing it during the Poly works against you.