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Joe Sullivan

Senior Security Consultant

EXPERIENCE
Joe has over 20 years of experience in Information Security. He has worked in Incident Response, forensics, penetration testing, and security leadership as a CISO for a financial institution.

EDUCATION & CERTIFICATIONS

  • GIAC Penetration Tester (GPEN)
  • GIAC Strategic Planning, Policy, and Leadership (GSTRT)
  • GIAC Certified Forensic Examiner (GCFE)
  • GIAC Certified Incident Handler (GCIH)
  • GIAC Security Leadership (GSLC)
  • GIAC Cloud Penetration Tester (GCPN)
  • GIAC Public Cloud Security (GPCS)
  • GIAC Certified Web Application Penetration Tester (GWAPT)
  • Certified Information Systems Security Professional (CISSP)
  • CNSSI 4012 Senior Systems Manager
  • CNSSI 4013 System Administrator in Information Systems Security
  • CNSSI 4014 Information Systems Security Officer
  • NSTISSI 4011 Information Systems Security Professional
  • NSTISSI 4015 Systems Certifier

PROFESSIONAL AFFILIATIONS

  • GIAC Advisory Board, ISC2 

Joe also teaches leadership courses for the SANS Institute.

INDUSTRY CONTRIBUTIONS
Joe has presented at security conferences including Check Point CPX, Information Warfare Summit, and BSides.

PASSION FOR SECURITY
Joe’s passion for security started in Incident Response and forensics in the late ‘90s. Since then, he has developed a passion for offensive security, security leadership, and teaching others.

Featured Blogs And Resources

Discover the blogs, analysis, webinars, and podcasts by this team member.

Blog September 21 2023

Basic Authentication Versus CSRF

I was recently involved in an engagement where access was controlled by Basic Authentication. One (1) of the findings I discovered was a Cross-Site Request…

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Blog June 27 2023

Introducing CoWitness: Enhancing Web Application Testing With External Service Interaction

CoWitness improves web application testing by capturing complete DNS and HTTP responses, revealing false positives and hidden vulnerabilities, and helping…

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Webinars January 14 2026

Tips for Incident Response Planning: Prepare Before Crisis Strikes

During our next webinar, our Incident Response experts will cover what organizations should do to prepare so they can respond quickly and be on the way to…

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Business Resources December 30 2025

Inside the Modern Red Team: How Attackers Think, and What Defenders Miss

Discover how modern Red Teams think like attackers, what defenders often miss, and how to strengthen your cybersecurity posture.

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Blog December 18 2025

Limiting Domain Controller Attack Surface: Why Less Services, Less Software, Less Agents = Less Exposure

Before we dive in, let’s get all the TrustedSec Certified Absolutes out of the way:All software presents some level of inherent risk.Only required software…

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News December 17 2025

News 5 Cleveland - Elyria Police responded to a reported restaurant robbery. But it was actually an AI prank.

AI quality is evolving rapidly, making it easier than ever to create convincing fakes from a phone. Advisory Solutions Director Alex Hamerstone spoke with News…

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Blog December 16 2025

Top 10 Blogs of 2025

Everyone has a year-end list, and this is ours. See what our top-performing cybersecurity blogs were in 2025, there could be some you might have missed!

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News December 13 2025

News 5 Cleveland - Holiday Warning: Keeping your loved ones safe from scams

As the holidays approach, the most effective defense against fraud is an informed family. Advisory Solutions Director Alex Hamerstone spoke with News 5…

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News December 12 2025

Security Advisory: React2Shell (CVE-2025-55182) - Critical RCE Vulnerability

A critical vulnerability affecting React Server Components (RSC) is being actively exploited. Here's what to look for and what to do next.

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News December 11 2025

WWL First News with Tommy Tucker - Holiday scams are in full swing. Here's how to protect yourself

Don't let scammers ruin your holiday season. Advisory Solutions Director Alex Hamerstone joins WWL First News to discuss the most common seasonal scams and…

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