Johnson Controls - - Responsibilities: Performs assigned system Service and Maintenance including preventative maintenance, commissioning, and installation.; Troubleshoots and resolves Security (Intrusion, Access Control, IP Video, Intercom, Network, Gates, and Barriers to name some of the systems; Diagnoses and repairs complex electronic control system malfunctions requiring extensive knowledge of a variety of electronic or digital controls systems and ability to test and write modifications in multiple languages of systems software.; Provides sketches of field changes and discrepancies for engineering corrections and drawings.; Communicates with customer upon arrival and before leaving the work site.