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Defense in Depth

May 7, 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 Steve Zalewski. Joining us is our sponsored guest, Rob Allen.

In this episode:

  • The vulnerable stack


Apr 30, 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 Steve Zalewski. Joining us is our sponsored guest, Heath Renfrow, co-founder, Fenix24.

In this episode:


Apr 23, 2026

What Makes a Successful Security Vendor Demo?

All links and images can be found on CISO Series.

Check out this post from Adam Palmer 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 is Ken Beasley, BISO,...


Apr 16, 2026

Should You Use Native or 3rd Party Cloud Management Tools?

All links and images can be found on CISO Series.

Check out this post from Steve Zalewski 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...


Apr 9, 2026

How Should We Measure the Performance of a CISO?

All links and images can be found on CISO Series.

Check out this post from the cybersecurity subreddit 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,...