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Defense in Depth

Defense in Depth

Written by: David Spark Steve Zalewski Geoff Belknap
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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.2018-2024 Spark Media Solutions, LLC Politics & Government
Episodes
  • How Best to Prepare Your Data for Your Tools
    Jan 22 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 David Spark, the producer of CISO Series, and Geoff Belknap. Joining them is sponsored guest Matt Goodrich, director of information security, Alteryx.

    In this episode:

    • The integrity challenge
    • Zero trust for AI outputs
    • Guardrails over garbage
    • It looks good...

    Huge thanks to our sponsor, Alteryx

    Alteryx is a leading AI and data analytics company that powers actionable insights that help organizations drive smarter, faster decisions. Alteryx One helps security, risk, and operations leaders cut hours of manual work to minutes, generate trusted insights at scale, and turn raw data into action faster than ever. Learn more at www.alteryx.com.

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    27 mins
  • Don't Try to Win with Technical Expertise. Win by Partnering.
    Jan 15 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 Jerich Beason, CISO, WM. Their guest is Pam Lindemoen, CSO and vp of strategy, RH-ISAC.

    In this episode:

    • From loudest to most trusted
    • Letting go of the win
    • Listening over proving
    • Beyond right and wrong

    Huge thanks to our sponsor, Alteryx

    Alteryx is a leading AI and data analytics company that powers actionable insights that help organizations drive smarter, faster decisions. Alteryx One helps security, risk, and operations leaders cut hours of manual work to minutes, generate trusted insights at scale, and turn raw data into action faster than ever. Learn more at www.alteryx.com.
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    29 mins
  • What Makes a Successful CISO?
    Jan 8 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 Edward Contreras, senior evp and CISO, Frost Bank. Joining us is Ejona Preci, group CISO, LINDAL Group.

    In this episode:

    • Consequence, not controls
    • The credibility gap
    • Defining the undefined
    • Expanding the mandate

    A huge thanks to our sponsor, ThreatLocker

    ThreatLocker makes Zero Trust practical. With Default Deny, Ringfencing, and Elevation Control, CISOs get real control that's easy to manage and built to scale. Stop threats before they execute and reduce operational noise without adding complexity. See how simple prevention can be at ThreatLocker.com/CISO.

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    25 mins
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