Yes you can absolutely get a job. Mental Health holds are private information and will only be revealed if someone request that you release your health records. People placed on MHH can still buy guns because a hold doesn't mean you have a lasting mental illness that will prevent safe gun ownership. Most people have felt depressed at one point and a decent percent have contemplated suicide, which would make them eligible for MHH, that doesn't mean they can't safely own a gun when they feel better. To the OP: understand that the job is stressful, but I know work stressors and life stressors often feel different, for me one used to be harder to cope with than another. I also know that as we get older we develop better ways to cope and just because at one point cutting helped doesn't mean that you don't now have better coping abilities. Good luck in your EMT endeavor, try not to let your past get in the way of what's in front of you.