InterVision Systems
John Koeller is a Network Telecommunications Engineer at InterVision Systems with over 35 years of experience in voice and data communications. With a primary focus on Cisco voice and data technologies for the past 20 years, John's career spans various roles, including IPT Network Engineer at Applied Information Systems and Network Engineer at Hussmann Corporation, where project management of a LAN upgrade was a key responsibility. Prior experience includes work as a Communications Technician at MCI/Worldcom, implementing voice and data products, and as a Mobile Communications specialist in the US Air Force and Missouri Air National Guard, focusing on wideband communications equipment.