Looking for Concrete developer to maintain existing app

We have a non-profit client with an administrative compliance tracking application built on Concrete. They are looking for an experienced Concrete developer - preferably an established small company - to provide managed hosting services, as well as occasional development services to modify or enhance the application. This contract mandates that the vendor be U.S.-based and the app hosted on a server within the U.S. Send me a message if you are interested in learning more about the client and the app.