Personnel who maintain Facility Related Control Systems (FRCS) of any type are required to implement cybersecurity to attain and maintain an Authority to Operate (ATO) on their respective systems. This document is a guide for installation personnel owning and operating control systems to assist in addressing the cybersecurity process for FRCS in the Army through the Risk Management Framework (RMF) approach, which encompasses six steps. This manual walks the reader through the administrative aspects of each step.