JouleX | 2,898 followers on LinkedIn. As of July 1, 2013, JouleX, Inc. is acquired by Cisco Systems. JouleX is a leading innovator in sustainable energy management systems for the enterprise. Its flagship solution, the JouleX Energy Manager (JEM), provides the Global 2000 and government agencies with the ability to monitor, analyze and control energy usage for all network-connected devices and systems across the enterprise, including in distributed offices, data centers and facilities.