This book provides a methodology for building an effective security program for distributed energy resources (DERs). It educates engineers as to the design, implementation, and maintenance of a security program suitable for control systems and the power grid. Security professionals will learn the specific requirements of industrial and control applications. The author describes the differences between the security requirements of a traditional IT system and those of industrial control systems, including SCADA systems. She provides a unified approach for building a security program for smart grid systems and applications using systems engineering techniques, standards, and best practices.