Built by operators.
Not suits.
“Cybersecurity” has become a buzzword sold by sales teams who’ve never touched a terminal. 0x3 Security is the opposite of that. We’re hackers who use our skills to protect, not exploit — thinking and operating like the adversary so small and medium businesses don’t have to.
The mission.
Our mission is simple: expose weaknesses before criminals do, and turn them into resilience. We emulate real-world adversaries with real tradecraft — penetration testing, red team operations, and managed defense powered by enterprise-class tools like CrowdStrike and NinjaOne.
We don’t just uncover vulnerabilities. We deliver prioritized, actionable fixes that strengthen resilience, satisfy compliance, and keep your business one step ahead in a threat landscape that never stops evolving.
We exist to give SMBs the same firepower the Fortune 500s rely on — without the suits, the upsells, or the price tag.
The operators.
Paul Nieto III ↗
A seasoned offensive security professional with 17+ years across physical security operations and executive protection, Paul brings a holistic approach — tackling security from both the digital and physical dimensions.
His work spans social engineering, RFID and NFC hacking, red team operations, and adversary emulation, with a deep focus on the techniques real attackers actually use. The certs aren’t résumé padding — they’re the ones that require you to actually break in.
And it’s about to hit the big screen. Paul stars in H4CK3D: One Last Job, One Last Breach — a real-life action and hacker film drawing on his experience across both physical and cyber security. The role is 98% him in real life: 100% authentic, real, and no PC.
Ziyad Mahmoud ↗
3+ years deep in offensive security, Ziyad breaks web apps, mobile apps, APIs, and enterprise networks for a living — finding the bug, weaponizing it into a working proof-of-concept, and turning it into a report that actually gets things fixed. Full-scope by nature: OWASP Top 10 and business-logic flaws, deserialization and client-side attacks, Android/iOS reverse engineering with SSL-pinning bypass and insecure-storage hunting, plus internal and external network ops with AD enumeration and lateral movement.
A relentless bug bounty hunter, he’s constantly live in programs dropping PoCs with real impact — SSRF, XSS, IDOR, client-side desync, and more. His kit runs Burp Suite, Cobalt Strike, Frida, Objection, Wireshark, and a stack of custom Python. He lives by clean reporting and remediation devs can actually ship.
Jason Solis ↗
A results-driven operator focused on penetration testing and threat hunting, Jason runs a methodical, documentation-first game — mapping external and internal network attack surface, hunting for what the scanners miss, and translating raw findings into risk that leadership can actually act on. OSINT and recon up front, clean reporting on the back end.
By day he’s also embedded in enterprise infrastructure as a hardware specialist at UnixSurplus in Sunnyvale, CA — living in servers, networking, and storage. That gives him a rare read on how infrastructure decisions quietly widen an organization’s attack surface. A former private banker at J.P. Morgan Chase, he speaks fluent stakeholder: drop him in a boardroom or a SOC and he’ll translate the same breach both ways. Currently grinding toward his OSCP+.
Nate Bellina ↗
Transitioning into cybersecurity as he wraps up his service as a U.S. Navy Seabee, Nate brings military-grade discipline and grit to the SOC. As an analyst and incident responder, he’s the one watching the wire when the alarms fire — triaging alerts, running down indicators of compromise, and containing threats before they spread.
He’s leveling up fast, training directly under Paul Nieto across both sides of the fight — detection and response on the blue team, and offensive tradecraft on the penetration-testing side. Learning how attackers break in is exactly what makes him sharper at locking them out.
Haley Quinn
The newest recruit and the voice of the op online. If social engineering is hacking the human layer, Haley hacks the algorithm — running 0x3’s entire social presence and turning red-team tradecraft into content that actually lands. She owns the brand voice across LinkedIn, YouTube, and Instagram, packaging breach stories and operator wins into signal the feed can’t scroll past, and making sure “built by hackers, not suits” shows up in every post, reel, and campaign.
Off the timeline, she co-stars alongside founder Paul Nieto in H4CK3D: One Last Job, One Last Breach. And when she’s off the clock, she’s one hell of a bartender — pour her a request and she’ll hand back the best Old Fashioned or French 75 this side of the terminal.
How we operate.
Offense-first
You cannot defend what you have never attacked. Every engagement is run by people who break things for a living — and we prove it with working exploits, not checkboxes.
Proof over paperwork
We hand you prioritized, actionable fixes and proof-of-concept — not a 200-page PDF nobody reads. Findings you can act on Monday morning.
SMB-obsessed
Enterprise-grade defense, scaled and priced for businesses that cannot afford a 50-person SOC. The big-league protection, none of the big-league overhead.
No suits, no script
You talk to the operators doing the work — in plain language. No account managers reading from a deck, no franchise playbook.
Find your gaps before they do.
Book a no-pressure consult with an operator. We’ll tell you straight where you’re exposed — and exactly what to fix first.