When you used your debit card today, do you know where that transaction was sent? Though it may conjure archival images of a 1950’s IT room stocked with enormous, low-tech machines, Mainframe technology is both modernized and heavily relied upon today. Mainframe architecture is some of the most reliable tech available, able to manage incredibly large input/output volumes with low risk of downtime and there are few signs of it being sunset in the decades to come. As protectors of the cyber landscape, understanding how mainframes are incorporated into a businesses topology and ways to secure mainframe architecture will remain important for any entity that utilizes this technology. In this talk we'll explore the pervasiveness of mainframe technology, why it will remain relevant to the future landscape of mission critical-applications, and several trusted solutions for helping to secure these incredible computers.