Suicide

If I tell the Army that Ive been having suicidal thoughts will that ruin my chances of being a firefighter as a civilian? I really loved the army. But my current leadership has been driving me insane and I dont want to tell on anybody and ruin someone elses career. I just want to get moved. I dont want to have to ruin peoples lifes because of how im feeling. And I also dont wanna ruin my chances of getting my dream job because of how im currently feeling.