Yiannis Vassiliades is currently serving as CISO in Residence at Zscaler, the global leader in Secure Access Service Edge (SASE) and Zero Trust IT Transformation. With over 25 years of experience in cybersecurity, Yiannis has been deeply committed to productizing transformative technologies that align with organizations’ strategic cybersecurity and risk objectives. He began his career specializing in Resilience and Disaster Recovery before diversifying his expertise to encompass various cybersecurity domains such as Security Analytics, Data Protection, Endpoint Detection and Response (EDR), Managed Detection and Response (MDR), and Cyber Risk Management. Yiannis has held leadership roles in prominent enterprises including IBM, Raytheon, and CA Technologies (acquired by Broadcom), as well as contributing to the growth of emerging companies from their seed stages to acquisition. Prior to joining Zscaler, Yiannis served as the Chief Product Officer at Ostrich Cyber-Risk, where he spearheaded the development and launch of cyber risk quantification solutions. Before that, he played a founding role in establishing and expanding the MDR division at Sophos, which has since become the largest MDR service provider with over 20,000 customers. Yiannis holds a Bachelor of Science in Information Systems from University of Maryland and earned his MBA from Johns Hopkins University.