Power generation from Distributed Energy Resources (DER) is expanding rapidly. As a global leader in deployment of DER, California is stepping up efforts to address cybersecurity concerns. This presentation highlights activity in a consortium of leading researchers, major US utilities and industry stakeholders to advance DER cybersecurity. Topics include current state, threat models and overall security objectives. We summarize security guidelines that apply to the PI System and approaches you can use for safe and reliable DER integration.