Defense in Depth

David Spark, Steve Zalewski, Geoff Belknap, Edward Contreras

Booking Overview

This is a weekly cybersecurity debate and analysis show featuring recurring hosts alongside one external security leader or sponsored industry guest. PR agencies can credibly pitch CISOs, CSOs, VPs of security, and senior experts in enterprise cybersecurity, cloud security, identity management, and artificial intelligence; booking difficulty is medium because guests generally hold senior security leadership roles.

Metrics

Episodes: 371

Frequency: Weekly

Rating: 4.8/5.0

Estimated listeners: 1k-10k

Gender skew: Male

Location: USA

YouTube: 9.1k subscribers

Contact Information

Publicly listed emails

info@cisoseries.com

Looking for the right person? Join Podseeker to find direct host and producer contacts and manage your podcast outreach.

Host

David Spark - Producer and host of the CISO Series, focused on cybersecurity analysis and industry debates.

Steve Zalewski - Cybersecurity professional and recurring co-host of the CISO Series.

Geoff Belknap - Cybersecurity professional and recurring co-host of the CISO Series.

Edward Contreras - Cybersecurity professional and recurring co-host of the CISO Series.

Booking Intelligence

Booking Requirements

medium

Typical Credentials:

CISOs, CSOs, vice presidents of security, and senior cybersecurity or information technology leaders with direct enterprise experience

Required Achievements:

C-suite or vice president-level security leadership, Enterprise cybersecurity strategy and implementation experience, Expertise in emerging security technologies and operational risk

Recent Guest Discussions

Will Gregorian - Identity And Access Management, Agentic Artificial Intelligence, Cryptographic Accountability, And Enterprise Security Auditing

Rajan Kapoor - Protecting Artificial Intelligence Agents In Microsoft 365 And Google Workspace, Cloud Security Architecture, Access Controls, And Data Protection

Adam Glick - Artificial Intelligence In Cybersecurity, Human-in-the-loop Security, Autonomous Systems, And The Changing Role Of Security Professionals

Recent Topics

Cybersecurity, Cloud Security, Identity Management, Artificial Intelligence, Risk Management

Episodes

Here's the recent few episodes on

Defense in Depth

What Makes a Good AI Security Deployment?

August 13, 2026

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 episode: Non-determinism changes everything The foundation problem Nobody owns the whole problem...

The Office Politics of Remediation

August 06, 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 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 Maturing from crawl to run Trust earns automation its place A huge thanks to our sponsor, Tel...

Why is Preventative Security So Difficult?

July 30, 2026

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, senior evp and CISO, Frost Bank. Joining us is Deneen DeFiore, vice president & chief information...

Publicly listed emails

info@cisoseries.com

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