Is there any job for a disposable man wanting to make a change?

So I'm still relatively young and I have realized that I will die alone. This is not a cry for help nor a supposition, it's a literal statement. I won't go into the personal reasons.

I don't have much interest in my continued existence past a certain age if I'm honest. I'll most likely get my college degree and have an okay job. But I'm curious if there's any employment that's for a good cause where guys who don't mind dying go to.