Would utilizing the SentryCard require an organization to rip out and replace its existing infrastructure?

No, there’s no need for rip and replace. The SentryCard is completely open-architected, meaning that it is compatible with all leading access control systems, door readers, and readily connects to the Active Directory via commonly used software (Microsoft, OKTA, PingID, VeridiumID, Windows Hello, Google, Citrix, Azure, etc.) Sentry maintains an “agnostic” approach to access control and has the ability to integrate (or embed) any of HID’s technologies (Prox, iClass, iClassSE and SEOS) as well as the entire NXP MiFARE suite (MiFARE Classic, DesFIRE EV1 and DesFIRE EV2), allowing it to work with any existing readers.