In this episode, host Aaron Crow sits down with Dean Parsons, one of the most recognized names in the OT and industrial control systems (ICS) security world, for a candid and insightful conversation.

Join Aaron and Dean as they explore what it truly takes to bridge the worlds of IT and OT. Drawing from decades of industry experience, their discussion covers everything from building trust across teams, to the superpower of understanding both operational technology and cybersecurity. Expect real-world stories, practical advice on breaking into OT cybersecurity, and memorable lessons from the plant floor to the boardroom.

They also break down what makes OT security fundamentally different from traditional IT approaches, why risk-based strategies are essential, and how building relationships, sometimes over donuts and coffee—can be just as important as deploying firewalls and patching systems. Whether you’re new to ICS and OT security, or a seasoned defender looking for fresh perspective, this episode brings actionable tips, honest assessments, and inspiration to help you better protect what matters most.

So grab your hard hat (and maybe a box of donuts!), and get ready for a masterclass on collaboration, building skills, and why trust is the real currency in the fight to secure our critical infrastructure.

Key Moments: 

05:32 Listening Over Speaking in Legacy Spaces

07:01 IT Security Teamwork and Trust

11:21 Cost-Efficient ICS Security Solutions

15:42 Converging Skill Sets in IT Security

17:36 OT vs IT: Different Risks

22:28 Prioritizing Post-Assessment Actions

23:20 Prioritize SANS ICS Critical Controls

29:31 Engineering Perspective on Critical Assets

30:47 Detecting Misuse of Control Systems

35:52 Collaborative Incident Response Dynamics

39:03 Remote Hydroelectric Plant Journey

40:45 Building Trust with Baked Goods

44:55 "Safety Crucial in Facility Disruptions"

48:50 ICS Security: Closing Safety Gaps

53:37 Enhancing ICS Security Controls

57:18 "ICS Summit and LinkedIn Activities"

About the guest : 

Dean is the CEO and Principal Consultant of ICS Defense Force and brings over 20 years of technical and management experience to the classroom. He has worked in both Information Technology and Industrial Control System (ICS) Cyber Defense in critical infrastructure sectors such as telecommunications, electric generation, transmission, distribution, and oil & gas refineries, storage, and distribution, and water management. Dean is an ambassador for defending industrial systems and an advocate for the safety, reliability, and cyber protection of critical infrastructure. His mission as an instructor is to empower each of his students, and he earnestly preaches that “Defense is Do-able!” 

Over the course of his career, Dean’s accomplishments include establishing entire ICS security programs for critical infrastructure sectors, successfully conducting industrial-grade incident response and tabletops, ICS digital forensics, and ICS/OT Cybersecurity assessments across multiple sectors. As a SANS Principal Instructor, Dean teaches ICS515: ICS Visibility, Detection, and Response, is a co-author of the SANS Course ICS418: ICS Security Essentials for Managers and an author of SANS ICS Engineer Technical Awareness Training. Dean is a member of the SANS GIAC Advisory Board and holds many cybersecurity professional certifications including the GICSP, GRID, GSLC, and GCIA, as well as the CISSP®, and holds a BS in computer science. When not in the field, Dean spends tine chasing icebergs off the coast of Newfoundland on a jetski, or writing electric 80s inspired electronic music in this band Arcade Knights.

Resources Mentioned: 

5 ICS Cybersecurity Critical Controls: https://www.sans.org/white-papers/five-ics-cybersecurity-critical-controls/

SANS ICS Cybersecurity Summit: https://www.sans.org/cyber-security-training-events/ics-security-summit-2025/

How to connect Dean: 

https://www.linkedin.com/in/dean-parsons-cybersecurity/

https://www.sans.org/profiles/dean-parsons/

Dean’s Book:

https://www.amazon.com/ICS-Cybersecurity-Field-Manual-EXCLUSIVE/dp/B0CGG6GMHW/

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