Nexus: A Claroty Podcast

Mike Holcomb joins the Nexus Podcast to discuss a Converged Actor Framework he developed and presented at the S4 Conference. The framework delineates  groups such as hacktivists and state threat actors based on the impact and frequency of their activity. State actors are leveraging hacktivist groups with greater frequency, and this convergence must be considered as defenders tasked with protecting OT and cyber-physical systems strategize around security. 
Subscribe and listen to the Nexus Podcast here. 
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Matthew Rogers, ICS Cybersecurity Lead at the Cybersecurity Infrastructure and Security Agency (CISA) joins the Nexus Podcast to discuss new guidance published by the agency to help manufacturers and asset owners move toward more secure OT communication protocols. 
Legacy protocols that contain little to no basic security capabilities are still prevalent in OT environments today. Rogers explains the risk and why manufacturers should begin their journey away from proprietary protocols and toward open standards. According to CISA's guidance, operators want authentication and integrity capabilities to protect process data, but need to understand the value and business impact of doing so. 
Download CISA's guidance here. 
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Jay Catherine, security architect for a major retailer, joins the Nexus Podcast to discuss the intricacies of securing logistics and operational technology within the retail sector. 
Catherine covers various aspects of logistics cybersecurity, including risks introduced by connecting OT and IoT to the network, and the challenges of managing third-party vendor and supply chain relationships. 
He also discusses his unconventional career path, from hockey broadcaster to his current cybersecurity role. 
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Feedspot has named Nexus a top IoT security podcast for 2025

Greg Garcia, Executive Director of the Health Sector Coordinating Council Cybersecurity Working Group, joins the Nexus Podcast to discuss the recent publication of the working group’s Sector Mapping and Risk Toolkit. 
The SMART toolkit is a methodology that helps healthcare providers visualize key services that support workflows in the industry and is also used to measure risk appropriately for each of those services.
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Get the SMART Toolkit here.

O'Reilly coauthor of Evidence-Based Security and longtime healthcare CISO Christopher Frenz joins the Nexus podcast to describe his organization's approach to cybersecurity that is rooted in transforming security from an artform to a science. 
Frenz discusses how this process through how he tests the efficacy of controls in his environment, and how the insights gained from this testing have allowed him to move toward better metrics and a better working relationship with leadership and the board. 
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