If you wanted to try one more thing, if they are actually working with the U.S. government (and most Countries probably have similar options) there are places y

If you wanted to try one more thing, if they are actually working with the U.S. government (and most Countries probably have similar options) there are places you can report them, generally anonymously. Contractors are required to maintain secure systems, even things you would never think of, and U.S. Defense contractors are especially at risk if they do not. I do disagree with one comment here. I would NOT delete your attempts to warn them. You deleting this could be worse for you later, or be seen as you deleting "evidence". As long as you are not doing anything illegal yourself, and you have done nothing to harm this company than you are safer to keep the records. If you do not, and you delete them, you have no proof and they could make later claims against you. Just my 2 cents, but IANAL. *edit fixed a word