Your NDA should state that it includes the company and its employees. Some will also state that they may need to show your product to a third party such as to get quotes. You would want to include them. Most companies that have a specific person in the company that works with outside submissions is authorized to sign for the company in that instance. Also check and see if the NDA says you are submitting and relying on your PPA or patent as your sole means of protection. If can be a stumbling block if you do not have a PPA or patent and still allow them to see it. That would be public disclosure. As with anything legal if you have any doubts consult a lawyer.