You're struggling with an ethical decision. Although you want to do the right thing, you're afraid speaking out to those in power will hurt your career. It may be necessary to risk your job to satisfy your conscience. Some people will accuse you of betraying the company. Nothing could be more ludicrous. There's no reason you should be loyal to an organisation that victimises others. Listen to your heart and file an official complaint. This courageous move could lead to a better position at a cutting-edge firm.