Defense in Depth

David Spark

info@cisoseries.com

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Booking Overview

Defense in Depth is a weekly cybersecurity debate show where the hosts pick one controversial, widely discussed issue and ground the conversation in InfoSec community insight. For PR, it’s a strong platform for security leaders and researchers who can explain nuanced tradeoffs on high-stakes security topics.

Metrics

Episodes: 364

Frequency: Weekly

Rating: 4.8/5.0

Estimated listeners: 1k-10k

Gender skew: Male

Location: USA

YouTube: 9.1k subscribers

Contact Information

info@cisoseries.com

For verified host and producer emails, sign up to view.

Host

David Spark - Co-host of Defense in Depth. Episode text describes him as the producer of CISO Series.

Booking Intelligence

Booking Requirements

medium
Typical Credentials:  
Cybersecurity CISOs or senior security leaders, and notable security communicators/media hosts; guests who can speak credibly on high-stakes, controversial security debates and translate technical tradeoffs into decision-making.
Required Achievements:  
CISO or senior threat operations leadership role, Public security media presence (e.g., notable podcast/video host), Authored/recognized expertise in cybersecurity strategy or operations

Recent Guest Discussions

Sean Walls - Debate Framing Around Attacker Advantage And Defensive Requirements

George Finney - Whether The 'attackers Only Need To Be Right Once' Idea Is A Misnomer (debate Framing For Attack Success Assumptions)

Leo Laporte - What It Takes To Be Successful In Cyber Media (format And Decision Gaps Beyond The News Cycle)

Graham Cluley - What It Takes To Be Successful In Cyber Media (positioning, Audience, And Industry Incentives)

Tyler King - Why Cisos Buy Security Solutions (sales Drivers And Political/risk-averse Decision Factors)

Recent Topics

Cybersecurity, Security Strategy, Threat Modeling, Governance, Risk Management

Episodes

Here's the recent few episodes on
Defense in Depth
:

Is the "Attackers Only Need to Be Right Once" a Misnomer?

June 25, 2026

All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and George Finney, CISO, University of Texas System. Joining is Sean Walls, CISO, Bob's Discount Furniture. In this episode: Asymmetric accounting Sometimes it really is that easy The spirit of the saying The cheapest way in A huge thanks to our sponsor, Native Security Native i...

What It Takes To Be Successful in Cyber Media

June 18, 2026

What It Takes To Be Successful in Cyber Media All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Dave Bittner, producer and host, The CyberWire. Joining is Graham Cluley, host of Smashing Security podcast and Leo Laporte, founder of TWiT (This Week in Tech) and host of Security Now podcast. In this episode: Format follows funct...

CISOs Buy For Selfish and Politically Risk-Averse Reasons (Not Because Your Product is the Best)

June 11, 2026

All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Howard Holton, CEO, GigaOm. Joining is Tyler King, senior director - threat operations and response, Sinclair. In this episode: Career insurance In the trenches together Who are you actually selling to? Common sense, uncommon in sales A huge thanks to our sponsor, Material Se...

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