When working with contractors, clients, consultants, and anyone else who may have access to confidential or proprietary information within your business, it is important to execute a non-disclosure and confidentiality agreement. This will prevent them from sharing, using, or implementing information they gain from working with you or inside of your business that is proprietary.
Oftentimes, proprietary information may not be protectable through copyright law, so it is important to have this agreement in place.
If you have a client contract or independent contractor agreement for hiring purposes from Contractista, your agreement already contains these important provisions.
However, if you are working with a contractor or consultant who provides you with THEIR contract to sign, it likely will not contain language to adequately protect your business's proprietary information. In that case, you should ask your contractor or consultant to sign a separate non-disclosure and confidentiality agreement.