Paul Nieto III

Doors. Firewalls. Humans. I breach them all ethically.

Paul Nieto III is the Founder and Principal Operator of 0x3 Security, a hacker-built Red Team and Managed Security firm based in Texas specializing in offensive security, adversary simulation, and autonomous threat response. A seasoned penetration tester and red team operator, Paul holds multiple advanced certifications including OSCP, CPTS, CBBH, and CRTO, and has spent years conducting offensive operations for organizations such as Royal Caribbean, Apple, and Box. His background blends physical security, cyber operations, and real-world red teaming, giving him a unique edge in understanding how attackers truly breach environments—both digitally and physically. At 0x3 Security, Paul leads engagements ranging from full-scope penetration testing to nation-state-style adversary emulation, combining tools like CrowdStrike Falcon, NinjaOne, and custom C2 frameworks with hands-on hacker tradecraft. He’s passionate about helping businesses move from reactive defense to proactive resilience—arming defenders with the same mindset as the attackers who target them. When he’s not simulating ransomware or bypassing RFID systems, you’ll find Paul speaking at security conferences, mentoring up-and-coming hackers, and creating educational content across YouTube, LinkedIn, and Instagram (@0x3_Security) to bridge the gap between enterprise defense and hacker reality.