Sometimes, there may be contractors who after completing the job tend to be a little sneaky and try to compete within the previous client's domain of operations itself. One way to protect your business from such scenarios would be your trusty old non-disclosure agreement. But if your area of business is primarily centered on customers such as a service provider, a non-solicitation agreement would be the way to go. Excited to help you on your way to secure your business' goodwill.