I have basically no knowledge of hair tests. But, if it was me, I wouldn't smoke. Of course that's easier said then done. First of all, it's a hair test; two, you've been clean so long now, you can't quit the streak yet man; three, sounds like a pretty nice job. I got a homeboy in a similar situation as you, except I think he's been clean for like 4 months now, but he's got a good job on the line so everybody's tellin him to just wait it out. Then once you got the job you can smoke all you want with no worries, provided they don't do random tests. It's your decision, but I figured I'd throw my two cents in.

You read my situation, I shouldn't be smoking either, but I am lol. It's pretty stupid on my part really, but I know I can usually get away with it, I doubt I could with a hair test. I quit for 4 months myself when I first got put on probation and I used to normally smoke some dank at least once a day, so it was a quick change. I had one drug test two weeks after I quit, then they didn't drug test me for 4 months, so I was like 'fuck it, I'm smokin,' now I got all these drug tests lol.