The cyberspace battlefield has changed. No longer an arena where adversaries launch a single distributed denial of service attack, lob a virus or infiltrate a network, it is now a state of persistent barrages and simultaneous campaigns. Attacks against high-value targets still occur, but they are accompanied by a torrent of continuous assaults on political, economic and security interests. Reflecting this altered, enlarged, and pan-organizational battlespace, the Defensive Cyber Operations Symposium has been re-named AFCEA TechNet Cyber, forming one of the pillars of the TechNet brand and encompassing both DoD as well as civilian agencies across a broad spectrum of mission sets. TechNet Cyber 2019 will be the staging area for military, industry and academia to discuss and plan how to achieve persistent engagement, persistent presence and persistent innovation. It is the opportunity to devise a new strategy to build resilience and defend networks.