Defense in Depth

Defense in Depth

Defense in Depth promises clear talk on cybersecurity’s most controversial and confusing debates. Once a week we choose one controversial and popular cybersecurity debate and use the InfoSec community’s insights to lead our discussion.

Episodes

July 10, 2025 27 mins

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 Edward Contreras, senior evp and CISO, Frost Bank. Joining us is David Cross, CISO, Atlassian.

In this episode:

  • The experience prerequisite
  • The bootcamp reality check
  • The compensation conundrum
  • The domain expertise i...
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All posts 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 Geoff Belknap. Joining us is Steve Knight, former CISO, Hyundai Capital America.

In this episode:

  • Streamlining vendor evaluations 
  • Moving beyond compliance theater
  • The scorecard skeptics
  • Finding the right balance
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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 Mike Johnson, CISO, Rivian. Joining is Hanan Szwarcbord, vp, CSO and head of infrastructure, Micron Technology.

In this episode

  • Embracing growth
  • An urgent need for creativity
  • Get the business context
  • Embrace your inner th...
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All links and images can be found on CISO Series.

Check out this post by Justin Pagano at Klaviyo 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 Geoff Belknap. Joining us is Jesse Webb, CISO and svp information systems, Avalon Healthcare Solutions.

In this episode:

  • Align the incentives
  • The feature and enforcement disconnect
  • Putting...
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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 (@dspark), the producer of CISO Series, and Steve Zalewski. Joining us is our sponsored guest Jason Steer, CISO, Recorded Future.

In this episode

  • We don't need more indicators
  • Creating more work
  • Generating actionable intelligence
  • Design for what you...
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All images and links can be found on CISO Series.

Check out this post by Gautam ‘Gotham’ Sharma of AccessCyber for the discussion that is the basis of our conversation on this week’s episode, co-hosted by me, David Spark (@dspark), the producer of CISO Series, and Steve Zalewski. Joining us is Krista Arndt, associate CISO, St. Luke’s University Health Network.

In this episode:

  • Verify then trust
  • Dishonesty on all sides
  • A lack ...
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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 (@dspark), the producer of CISO Series, and Geoff Belknap (@geoffbelknap). Joining us is Dennis Pickett, vp, CISO, Westat.

In this episode:

  • Stop siloing cybersecurity
  • Leading the charge
  • A culture of ownership
  • Preparing for resilience

A huge than...

May 15, 2025 33 mins

All links and images for this episode 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 (@dspark), the producer of CISO Series, and Yaron Levi, CISO, Dolby. Joining us is Joey Rachid, CISO, Xerox.

In this episode:

  • It's a balancing act
  • Choose to leave the kids' table
  • Your team is essential
  • Don't change CISOs midstream
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All links and images for this episode 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 (@dspark), the producer of CISO Series, and Howard Holton, COO, Gigaom. Joining us is our sponsored guest, Rob Allen, chief product officer at ThreatLocker.

In this episode: 

  • Reinforcing zero trust
  • Focus on effectiveness
  • Understanding...
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All links and images for this episode 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 Steve Zalewski. Joining us is Jay Jay Davey, vp of cyber security operations, Planet

In this episode:

  • Aligning incentives
  • The realities of the job
  • Delivering ROI
  • Holistic cybersecurity

Thanks to o...

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All links and images for this episode 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, Eric Gold, chief evangelist, BackSlash.

In this episode:

  • Start with the culture
  • Moving AppSec to a higher level
  • A strategy for security
  • Maturing the ...
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All links and images for this episode can be found on CISO Series.

Check out this post from Jerich Beason, CISO at WM, 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 Dan Walsh, CISO, Datavant. Joining us is Rinki Sethi, vp and CISO, BILL.

In this episode:

  • You need a solid foundation
  • A lot depends on the role
  • Underappreciated skills
  • ...
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All links and images for this episode 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 by me, David Spark, the producer of CISO Series, and Geoff Belknap. Joining us is Alex Hutton, CISO, Atlantic Union Bank.

In this episode:

  • The race to differentiate 
  • Don’t blame Gartner
  • Simplifying is complicated
  • Seeking c...
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All links and images for this episode 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 Jason Elrod, CISO, MultiCare Health System. Joining us is our sponsored guest, Nick Muy, CISO, Scrut Automation.

In this episode:

  • Supercharging teams
  • Shifting to proactive
  • A unique opportunity
  • A human...
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All links and images for this episode can be found on CISO Series.

Check out this post by Tallis Jordan of the U.S. Army Cyber Command 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 Montez Fitzpatrick, CISO, Navvis.

In this episode:

  • Start with foundations
  • Learning to learn
  • Don’t get hustled
  • Building a p...
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All links and images for this episode can be found on CISO Series.

Check out this post from Yaron Levi 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 Mike Johnson, CISO, Rivian. Joining us is Yaron Levi, CISO, Dolby.

In this episode:

  • A knowledge deficit
  • Talk is cheap
  • What’s the difference?
  • Answer the preliminaries

HUGE thanks ...

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All links and images for this episode can be found on CISO Series.

Check out this post by Rachel Bicknell of Dell Technologies quoting Mic Merritt of Merritt Collective 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 Jimmy Sanders, president, ISSA International. Joining them is Ngozi Eze, CISO, Levi Strauss.  

...

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All links and images for this episode 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 (@dspark), the producer of CISO Series, and Howard Holton, CTO, GigaOm. Joining us is Francis Odum, founder, Software Analyst Cybersecurity Research.

In this episode:

  • Rebalancing the SOC
  • The case for consolidation
  • It comes down to dat...
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February 27, 2025 32 mins

All links and images for this episode 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 (@dspark), the producer of CISO Series, and Lee Parrish, CISO, Newell Brands. Joining us is David Tyburski, vp of information security and CISO, Wynn Resorts.

In this episode:

  • C...

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All links and images for this episode 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 (@dspark), the producer of CISO Series, and Geoff Belknap (@geoffbelknap). Joining us is Elad Koren, vp, product management, Cortex Cloud, Palo Alto Networks.

In this episode:

  • Context drives t...
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