IEEE ISI 2018, the largest conference of its kind in the field of security informatics, annually brings together the international community of security researchers and practitioners, from academia, industry, and government. Initially begun in 2003 with funding from the National Science Foundation, ISI is now under the auspices of the IEEE and showcases security work and research in computing, engineering, and information science, public policy, law enforcement and intelligence, and the social and behavioral sciences. This year’s conference theme is Cybersecurity and Big Data. ISI will feature cutting edge research papers, stellar speakers and panelists, a dynamic poster and networking session, and other participatory events designed to encourage networking and future partnership.