I received a stipulation discontinuing action, does this mean its over?

"...with Prejudice" certainly makes it seem over, without seeing the documents and knowing history/context.

Can i be threaten about my job in a union shop?

No not a state law. Even in a union shop you can be fired, and then the union can go through the grievance and arbitration process to try to get...

What am I supposed to do at this point ?

??? This is not an employment law question for NY. Consider contacting specialized agencies that help teens in your situation such as Covenant...

How can I find out why I was not hired?

Complain to whom? Absent evidence of discrimination against you based on race etc, there is no action to take and they have no obligation to tell...

Can you be terminated after being given a performance improvement plan on July 12, for the month of July?

Unless you have an employment contract you are employed at will, so you can be fired unless evidence of discrimination based on race etc

Do i need a lawyer to file a charge of discrimination in the workplace?

Technically you don't need a lawyer but the help of a lawyer gives you your best chance to win. The lawyer you consult can best assess your...

Unless you own more than 50% of the company or have an employment contract, yes. No employment law forbids that. Not sure of the impact in...

12 year employee with company exempted from 401K Plan.

Very hard. Normally employees need to sign up, paperwork needed for 401k administrator (such as an investment company), designate beneficiaries etc...

Can my employer reduce my salary by half without my consent?

They don't need your consent to inform you of this. If you stay, you have consented. If you quit you have not. I think you have an excellent...

I live in NY and was employed by a company based in Chicago. I want to sue them for discrimination - can I file in NY?

You have a nexus to NY because that is where you live. NYDHR might not have jurisdiction but EEOC and the Federal Courts will. Good luck.