An arrangement for communications about, and management of a resource, such as energy, using a mobile device. A utility provides a resource for a facility. The facility can provide a resource in another sense. The utility has an information system that sends messages and data relative to the utility and the facility, to the mobile device. The mobile device provides commands and data, based on messages from the utility to an energy management system of the facility. The energy management system sends messages and data to the mobile device. The mobile device sends commands and data to the utility information system. A facility manager uses the mobile device and makes decisions relative to communications at the device. The communications are wireless and the device is portable and operated at various locations. The communications can involve other energy management systems and facilities.