root@rootreap3r_
$ whoami --verbose [ok] target identified

RootReap3r.

also spelled RootReaper · Root Reaper
Joshua Urianza — AI Security Engineer specializing in LLM/agentic threat modeling, prompt-injection defense, and red-team scenario design, with a track record of discovering zero-days missed by enterprise tooling via manual exploit analysis. 100+ live exploits against client LLM systems, a decade securing nuclear C2, SAP/TEMPEST, and federal cloud environments at the TS/SCI level, and full ATO delivered on a $147B government program. M.S. AI candidate at Georgia Tech, researching adversarial robustness in agentic systems.
Top-Tier AI Red-Teamer & AI Security Engineer TS/SCI Active Clearance 10+ yrs DoD & AI Security M.S. AI Candidate — Georgia Tech Adversarial Prompting Since Mid 2022 One of the First AI-to-AI Warfare Researchers · Since 2022 AI Red-Teamer / AI Security Engineer — Independent Contractor
2,730
TS-SAP assessments
476
security audits (Unclass–Top Secret)
100+
jailbreak / prompt-injection vulns exploited
<2min
C2 containment (from hours)
$147B
gov't program accredited (full ATO)
0
attributable incidents
Joshua Urianza (RootReap3r), security engineer
scope of work

Focus areas

ADVERSARIAL

Nation-state TTP attack engine

Built a red team engine auto-generating live attack scenarios from nation-state TTPs via MITRE ATT&CK/ATLAS, compressing adversary emulation cycles from weeks to hours.

PROTOCOL

RAG & MCP exploitation research

Red-teamed multi-modal RAG pipelines and MCP exploitation chains on nuclear-classified infrastructure; hardened findings into enforceable governance controls.

RESEARCH

TS/SAP vulnerability discovery

Surfaced previously unknown TS/SAP vulnerabilities through adversarial analysis beyond automated tooling, converting findings into IR tabletop scenarios to close gaps before nation-state exploitation.

GOVERNANCE

NC3 / nuclear ATO authorship

Authored ATO packages (~2,500 controls, SCTMs, SSPs) as Lead ISSO for Sentinel and Nuclear Command & Control programs. Led accreditation lifecycle across 10 packages for a $147B government program, mapping artifacts against all 20 NIST Rev 5 control families to achieve full ATO.

track record

Experience

Jul 2026 — Present

AI Red-Teamer / AI Security Engineer (Contract)

Mercor | LinkedIn
  • Exploited 100+ direct and cross-domain prompt-injection/jailbreak vulnerabilities across client LLM-integrated products within the first week, validated and scored via structured red-team taxonomy.
  • Built and deployed a multi-tenant AI chat widget embeddable on any site in <30 min, with production-grade security: CORS allowlisting, prompt-injection screening, XSS-safe rendering, CSRF protection, timing-safe auth.
  • Surfaced MCP tool-poisoning, schema injection, and cross-server privilege escalation via over-privileged server exploitation across client AI tool infrastructure.
Oct 2022 — Aug 2026

Senior Cybersecurity Engineer

Accenture Federal Services
  • Zero-Day Discovery & Detection Engineering: Drove security accreditation for a $147B TS/SAP cloud program by manually reverse-engineering zero-days missed by enterprise tooling, building an AI correlation engine (NVD/CVE/CNNVD) to automate triage, and engineering Splunk detections that cut C2 dwell-time from hours to <2 minutes—securing full ATO across 10 NIST Rev 5 control packages.
  • Supply-Chain Security: Built a supply-chain risk correlation tool cross-referencing NVD and ExploitDB against asset versions to surface unpatched vulnerabilities, with open-source/GitHub sweeps and foreign-influence/vendor-provenance checks on hardware, software, and AI components.
  • Threat & Risk Assessments: Ran 2,730 adversary-informed threat and risk assessments across unclassified/Secret/TS-SAP environments, correlating 524 vulnerability scans and 476 audits through offensive security expertise and exploit research.
  • Incident Response & Scenarios: Architected the incident response plan and designed 16 quarterly adversarial scenarios spanning four classification environments (unclassified through TS/SAP), authoring each from threat scenario through after-action report.
  • Compliance & Governance: Authored risk and controls accreditation packages (~2,500 controls, SCTMs, SSPs) as Lead ISSO for Sentinel and Nuclear Command & Control programs.
Oct 2020 — Oct 2022

Security Program Manager

DS&S
  • Personnel & Insider Threat: Directed personnel security and insider threat program for 2,350+ AFNWC personnel holding Top Secret/SAP access—vetting for counterintelligence exposure, adjudicating clearance eligibility, and validating need-to-know before granting access to Restricted Data.
  • Physical & Nuclear C2 Security: Owned industrial/physical security for $41M+ in SAP/TEMPEST facilities across multiple classified vaults and secured networks transmitting Nuclear Command & Control design data and DOE Restricted Data, running adversarial assessments across all control layers to close every gap identified and maintaining zero attributable incidents.
  • Customer Recognition (2021): Received formal recognition following an ICBM Systems Directorate Security Support PMR after the government customer specifically cited outstanding performance and the development of an innovative new badging-system plan provided to the Deputy Director.
Mar 2020 — Oct 2020

Cyber Automation Lead

Sebastian Tech Solutions (DISA)
  • Built SOAR/PowerShell-Python automation for account remediation, access provisioning, and IR triage—cutting escalation decision time on leakage/compromise cases from minutes to seconds—across DISA, White House, Pentagon, and 7th Fleet.
Apr 2018 — Mar 2019

Cyber Investigations Lead

Netflix
  • Led response to the 2019 credential-stuffing campaign compromising 900+ accounts, correlating device/IP/geolocation/VPN signals to restore 100% of accounts to original owners.
Mar 2015 — Apr 2018

Incident Response Lead

The Results Company
  • Advanced from help desk analyst to IR Lead, resolving 10,264 tickets and coordinating a multi-person IR team while sustaining a 96% stakeholder satisfaction scorecard.
service

Military Service

10 Oct 2018

Teal Rope Initial Training

81st Training Wing · Sexual Assault Prevention and Response Office

Completed Teal Rope Initial Training through the 81st Training Wing Sexual Assault Prevention and Response Office.

Jan 2017 — Jan 2023

Weapons Director

Air National Guard

A Weapons Director sits in an Air Operations Center or Control and Reporting Center, watching a live radar picture and directing fighter aircraft in real time — sorting real threats from noise, prioritizing which contact gets worked first, and issuing short, unambiguous instructions to pilots who are relying on your read of the situation because they can't see what you can see. It's high-tempo decision-making under incomplete information, inside a strict rules-of-engagement framework, where a wrong call has immediate consequences and there's no time to second-guess.

That's a closer match to AI red-teaming and incident-response work than it might sound: triaging a flood of findings in real time, deciding what's a real threat versus noise, working inside an explicit scope/rules-of-engagement boundary, and communicating clearly and fast when the picture is incomplete. The instincts built directing intercepts translate almost directly to directing a red-team engagement or running point during a live incident.

This scene (from a film, not real footage) captures the tempo and stakes of directing air assets in real time — the closest illustration I've found of what that decision-making tempo actually feels like.

Also fiction, not real footage — but the command-and-control room in this scene is a reasonable stand-in for the kind of operations floor a Weapons Director actually works from.

background

Education & Awards

In Progress

M.S. Artificial Intelligence · Georgia Institute of Technology

In progress (part-time). Research: adversarial robustness & red-teaming of LLMs and agentic systems.

Completed

B.A.S. Cyber Operations, Defense & Forensics · University of Arizona

NSA Center of Academic Excellence in Cyber Operations; malware reverse engineering, digital forensics.

2021

AFNWC Security Community Award · Air Force Nuclear Weapons Center

Security Outstanding Team Award, NXOS Security Team. Also: Minuteman III Personnel Award, ICBM Personnel Award.

2021 AFNWC Security Community Award crystal plaque presented to Joshua Urianza, NXOS Security Team
2021 AFNWC Security Community Award — Security Outstanding Team Award, NXOS Security Team.
certification path

Interactive certification roadmap

Click a node to see the certificate. Gold = completed, purple = in progress. Concept-based progression by rarity, domain, and offensive vs. defensive focus.

Select a node

Click any certification above to view domain alignment, rarity, and offensive/defensive weighting.

Deciding which cybersecurity certification to pursue next? See the full interactive security certification roadmap — a concept-based breakdown of certs by rarity, domain, and offensive vs. defensive focus.

builds

Projects

PHANTOM

AI-Powered Active Defense & Threat-Hunting Platform

Multi-agent active-defense platform using ML-based C2 beacon detection, passive attribution (geolocation, JA3, threat-intel), confidence-gated response, and cryptographic chain-of-custody evidence; shipped 105 passing tests and one-command FBI/CISA report generation (STIX 2.1, IOC).

ML beacon detectionJA3 / ASN attributionSTIX 2.1105 tests
recon-sweep

LLM Safety-Evaluation Harness

Red-team harness replacing self-graded LLM safety scoring with deterministic pass/fail gates (canary extraction, PII regex, injection detection) and an advisory-only LLM judge calibrated against a golden set, aligned to NIST AI RMF MEASURE/MANAGE, with a code-enforced allowlist immune to prompt-injection scope escape. Read the technical breakdown →

NIST AI RMFcanary / PII gatesallowlist isolation
RMF-AI-COPILOT

AI-Driven NIST 800-53 Rev 4→5 Migration Pipeline

Pipeline generating SCTM, eMASS export, and POA&M items from SSP content, grounding every AI judgment against the full 1,189-entry NIST Rev 5 catalog; provider-agnostic (Anthropic/OpenAI/Bedrock GovCloud), deployable air-gapped/NIPR with zero code changes.

NIST 800-53 Rev 5eMASS / SCTMair-gappedGovCloud
AI IR Tabletop

Adversarial LLM Incident-Response Tabletop Engine

Self-contained engine where an LLM plays a state-consistent threat actor across 23 scenarios and 9 MITRE-mapped APT profiles, with attacker/grader roles split across separate API passes and offline .docx after-action reports.

23 scenarios9 APT profiles.docx AAR
essays

Writing

2026-08-23

From Cryptic Commands to Agentic CLI: How Claude Code Rewired the Terminal

Why decades of memorized flags and manual scripting are giving way to natural-language, autonomous terminal work — with a side-by-side comparison of manually diagnosing a broken service versus letting Claude Code do it end-to-end.

2026-08-16

From Tool Mastery to Agent Orchestration: How AI Rewired Offensive Cybersecurity

How agentic AI reshaped offensive security between 2016 and 2026 — RoE-gated agent orchestration, hyper-scale recon, exploitation chaining, the global AI tooling landscape, and the AI-vs-AI attack surface: indirect prompt injection, context poisoning, and agent hijacking.

2026-08-11

My First Week Red Teaming as a Contractor: What Nobody Tells You

Field notes on an unexpectedly diverse team, exploiting 100+ vulnerabilities in a week, and a recognition gap around obfuscated prompt injection — with two rewritten examples showing a real finding versus one that isn't.

2026-08-01

Building recon-sweep: A Scope-Gated Harness for Agentic AI Red Teaming

Inside recon-sweep's architecture — code-level scope-gated pentesting and falsifiable, canary/PII/injection-gated AI evaluation instead of LLM self-grading.

2026-07-28

Before ChatGPT: The First AI Jailbreak Community Nobody Talks About

A firsthand account of adversarial prompting against Midjourney's content filter months before ChatGPT's "DAN" prompts — and why keyword/semantic-matching guardrails still fail the same way today.

stack

Tooling & frameworks

MITRE ATLAS / ATT&CK NIST 800-53 Rev. 4 Metasploit Cobalt Strike / Sliver Mimikatz / BloodHound Python PowerShell Sysmon / Zeek / auditd STIX 2.1 Federal Cloud (Azure/AWS/GCP) ACAS SOAR

certs  SecAI+ (Beta Cohort) · SecurityX (CASP+) · PenTest+ · Security+ · Azure AI Fundamentals · PWPE (<100 holders worldwide) · PNPT · eCPPTv3 · COAE (HTB AI Red Teaming, #213 worldwide)

in progress  OSAI+ (Offensive Security)

side project

Music

throwback

High School Memories

2011 Utah 2A state wrestling champion

160 lbs, Kanab High School. Round-by-round results and the original newspaper coverage.

Open high school memories →
reach out

Contact

$ cat contact.txt