About Us

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Paul Nieto III — Founder & Principal Operator, 0x3 Security

Paul Nieto III is the founder of 0x3 Security, a hacker-built cybersecurity firm dedicated to delivering offensive security, managed detection, and threat-hunting services designed specifically for small and medium businesses. He combines deep red team and penetration testing expertise with MSP-grade security operations to give SMBs enterprise-level defenses—without the enterprise-level cost.

With a disciplined foundation from his service in the U.S. Navy, Paul brings a mission-first mindset to modern cyber defense. He holds multiple advanced offensive security certifications and consistently hones his skills through platforms like Hack The Box and specialized red team training. His real-world experience spans external and internal penetration testing, web and API assessments, Active Directory, MedTech,  as well as OT/ICS and physical red team operations.

In addition to technical depth, Paul designs client-ready deliverables, SOC/MSSP processes, and integrates enterprise tools such as CrowdStrike and NinjaOne into managed security stacks for SMBs. He is an active voice in the infosec community—speaking at events, producing training content, and delivering attacker-informed insights that help organizations strengthen defenses, meet compliance requirements, and stay resilient against evolving threats.

For speaking engagements, partnerships, or to book an assessment with 0x3 Security, connect with Paul via LinkedIn or at 0x3Security.com.

At 0x3 Security, we are hackers — channeling the same tactics, tools, and mindset as real adversaries to strengthen the businesses we protect. Our mission is to uncover and weaponize weaknesses before attackers do, transforming them into resilience for our clients. By fusing red team operations, penetration testing, and managed defense with enterprise-class platforms like CrowdStrike and NinjaOne, we deliver relentless, hacker-driven protection that keeps SMBs secure, compliant, and always ahead of the threat. 

At 0x3 Security, we are hackers who use our skills to protect, not exploit. Our mission is to think and operate like adversaries so small and medium businesses don’t have to. By delivering penetration testing, red team operations, and managed defense powered by enterprise-class tools like CrowdStrike and NinjaOne, we expose weaknesses before criminals do and transform them into resilience. We exist to keep SMBs secure, compliant, and one step ahead in an ever-evolving threat landscape. 

At 0x3 Security, our vision is to be the leading consulting firm in the industry. We aim to achieve this by constantly innovating and providing exceptional services that exceed our clients' expectations.