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Defense in Depth

Defense in Depth

David Spark, Steve Zalewski, Geoff Belknap 362 Episodes Oct 8, 2026

Defense in Depth is a weekly cybersecurity podcast that tackles controversial and confusing debates in the InfoSec community. Each episode focuses on a single hot topic, leveraging insights from security professionals to drive the discussion. The show aims to provide clear, balanced analysis on issues that divide the industry.

Episodes

Can SMBs Get the Same Security as Everyone Else?
Can SMBs Get the Same Security as Everyone Else? Oct 8, 2026 33:26 All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation for this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Steve Zalewski. Joining us is their sponsored guest, Mark Stockley, cybersecurity evangelist, ThreatDown. In this episode: The ripple effect The economics of ignoring SMB Let the defau
Why Do We Keep Complaining About the Same Issues in Cybersecurity?
Why Do We Keep Complaining About the Same Issues in Cybersecurity? Oct 1, 2026 33:41 All links and images can be found on CISO Series LinkedIn used to have a decent reputation among cybersecurity professionals. But lately, it feels like our feeds are relitigating the same debates every day, just with different faces. Has the situation changed? Check out this post by Allan Alford of NTT Global Data Centers for the discussion that is the basis of our conversation on this week's epi
Securing AI-Generated Open Source Code
Securing AI-Generated Open Source Code Sep 24, 2026 35:00 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 Steve Zalewski. Joining us is our sponsored guest, Abby Kearns, CEO, ActiveState. In this episode: Trust, but nobody verifies The economics of trust just changed Implicit trust doesn't
BONUS EPISODE: Super Cyber Friday Express - Hacking Vendor Selection
BONUS EPISODE: Super Cyber Friday Express - Hacking Vendor Selection Sep 21, 2026 21:17 All links and images can be found on CISO Series This is a bonus episode of our brand new podcast, Super Cyber Friday Express — a 20-minute highlight version of our live one-hour show we do every available Friday at 1 p.m. Eastern. In this episode, David Spark is joined by Karl Mattson, founder and managing director of Squared Circle Ventures, and Howard Holton, founder and principal analyst at P
How AppSec Needs to Change For the Speed of AI
How AppSec Needs to Change For the Speed of AI Sep 17, 2026 26:20 All links and images can be found on CISO Series Check out this post by Anand Singh, CSO, Symmetry Systems, 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 Steve Zalewski. Joining us is Ryan Barrett, svp, security, Intermedia Cloud Communications. In this episode: Risk by default, not by decision Iden
Building Resilience for Microsoft 365
Building Resilience for Microsoft 365 Sep 10, 2026 27:43 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 Brett Conlon, CISO, American Century Investments. Joining us is our sponsored guest, Simon Hughes, vp of field security at CoreView. In this episode: Ecosystem, not platform Beyond back
Recommendations to Reboot the Security Vendor Pitch
Recommendations to Reboot the Security Vendor Pitch Sep 3, 2026 28:15 All links and images can be found on CISO Series Check out this post by Val Tsanev of CyberRisk Alliance, for the discussion that is the basis of our conversation on this week's episode co-hosted by David Spark, the producer of CISO Series, and Edward Contreras, senior evp and CISO, Frost Bank. Joining is Jill Rhodes, svp, CISO, Option Care Health. In this episode: The ten-minute test Relevance
Market Confusion Is Responsible for the Biggest Gaps in Cybersecurity
Market Confusion Is Responsible for the Biggest Gaps in Cybersecurity Aug 27, 2026 29:47 All links and images can be found on CISO Series Check out this post from Joe Head of RELEX Solutions for the discussion that is the basis of our conversation on this week's episode co-hosted by David Spark, the producer of CISO Series, and Edward Contreras, senior evp and CISO, Frost Bank. Joining is Mary Rose Martinez, CISO, and vp of digital technology services, Marathon Petroleum Corporation
Will AI Replace Detection Roles in Cybersecurity?
Will AI Replace Detection Roles in Cybersecurity? Aug 20, 2026 35:13 All links and images can be found on CISO Series Check out this post from Caleb Sima of Whiterabbit for the discussion that is the basis of our conversation on this week's episode co-hosted David Spark, the producer of CISO Series, and Yaron Levi, CISO, Dolby. Joining is Adrian Ludwig, CSO, Rippling. In this episode: The messy middle The automatable part Where automation stops The influence ga
What Makes a Good AI Security Deployment?
What Makes a Good AI Security Deployment? Aug 13, 2026 31:19 What Makes a Good AI Security Deployment? All links and images can be found on CISO Series Check out this post by Chris Matthews of UpGuard 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 Edward Contreras, senior evp and CISO, Frost Bank. Joining us is Peter Liebert, CISO, Salesloft & Clari. In this epi
The Office Politics of Remediation
The Office Politics of Remediation Aug 6, 2026 28:48 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 David Spark, the producer of CISO Series, and Dan Walsh, CISO, Datavant. Joining is our sponsored guest, Elizabeth Nammour, founder and CEO, Teleskope. In this episode: Data ownership before automation A shared vocabulary for agent risk
Why is Preventative Security So Difficult?
Why is Preventative Security So Difficult? Jul 30, 2026 30:16 All links and images can be found on CISO Series Prevention in cybersecurity is a lot like flossing: everyone knows they should do it, but few do it enough. What's stopping us? Check out this post by Ross Haleliuk of Venture in Security 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 Edward Contreras,

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