Josias Fabian

iamJfabian

Cybersecurity Professional & Pentester

What I work with

Slack

Airtable

Claude Code

Cyver

Python

Java

Burp Suite

Reporter

Bash

Fortinet

MSSQL

Qualys

Cisco

Virus Total

Ubiquiti

JWT

Postman

Nginx

Wireshark

.NET

Ubuntu

Linux

Azure

Google Cloud

Oracle

AWS

MongoDB

Redis

MySQL

Neo4j

Docker

Python

Java

Linux

Azure

Google Cloud

Oracle

AWS

MongoDB

Redis

MySQL

Neo4j

Docker

LangChain

Windows

WordPress

vscode

Obsidian

Notion

Joomla

Apache

Laravel

Deepseek

Experience

Thoropass

Penetration Tester

2025 - Present

I conduct end-to-end penetration testing engagements across a wide range of targets including web applications, APIs, mobile apps (iOS & Android), internal networks (Windows & Linux), and cloud environments (AWS, Azure, GCP). I deliver detailed technical and executive-level reports with clear remediation guidance, working closely with clients throughout scoping, execution, and remediation validation.

Cybersecurity Blue Team & Red Team

Penetration Tester

2024 - 2025

I work as a Penetration Tester, conducting comprehensive offensive security assessments across cloud infrastructures, web platforms, mobile applications, and internal networks. My role involves simulating real-world cyberattacks to identify and exploit vulnerabilities before malicious actors can. I specialize in Azure security, where I uncover misconfigurations and abuse identity mechanisms to demonstrate risk impact. I also develop custom payloads tailored to specific environments and automate reconnaissance, exploitation, and post-exploitation workflows to maximize efficiency. My findings are documented in detailed technical reports and high-level executive summaries, providing clear remediation guidance and strategic risk mitigation insights for stakeholders.

Grey Matter Technologies / Hotel W&P Santo Domingo

Infrastructure Manager - Outsourced to Hotel W&P

2023 - Past

I served as the Infrastructure Manager, where I led the end-to-end design, deployment, and lifecycle management of secure, high-performance IT systems across both on-premises and cloud environments. My responsibilities included architecting resilient network and server infrastructures, implementing robust cybersecurity controls, and optimizing system performance for critical business operations. I ensured high availability and business continuity through strategic backup, monitoring, and disaster recovery solutions. Additionally, I directed cross-functional teams in delivering infrastructure upgrades, enforced compliance with industry security standards, and continuously evaluated emerging technologies to enhance operational efficiency and scalability.