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Whoami

·2 mins
Author
S3r4ph1el
Table of Contents

Cybersecurity professional specializing in Offensive Security and Red Team operations. Former Brazilian Army officer — a foundation that shaped the discipline, leadership, and resilience I bring to every engagement. Passionate about the offensive field, I continuously sharpen my skills through CTFs, Bug Bounty programs, and adversary simulation, operating across the full attack lifecycle on Web Applications, Networks, Mobile, and AI systems.

Experience
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Offensive Security Analyst — Confidential 12/2025 – Present

  • Penetration testing following PTES and OWASP methodologies (WSTG/ASVS · MASTG · Top 10 for LLMs)
  • Red Team Operations simulating advanced threat TTPs based on the Cyber Kill Chain framework
  • Risk analysis and technical report writing to support vulnerability remediation
  • Collaboration with infrastructure, development, and defensive security teams

Cyber Threat Intelligence Intern — Teltec Solutions 11/2025 – 12/2025

  • Threat data collection and correlation from open and closed sources (Axur)
  • Development of playbooks, methodologies, and Cyber Threat Intelligence (CTI) reports
  • Implementation and orchestration of tooling environment via Docker and Portainer

Cybersecurity Leader — CJR · UnB Junior Computing Company 07/2024 – Present

  • Founded and led the UnB Offensive Security internal group, training members through labs and pentesting lectures
  • Company stack: React.js, Nest.js, Next.js, Prisma, TypeScript
  • Awarded “Innovation Member” and other internal recognitions for initiative

Military Officer — Brazilian Army · Brasília, DF 02/2023 – 03/2024

  • 1st place overall in the 2023 Reserve Officer Training Course
  • Awards: Apollo Aspirant (overall highlight of the year), Best Physical Fitness, Best Academic Performance

Education
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Bachelor’s Degree in Computer Science University of Brasília (UnB) 03/2024 – 12/2028 · In progress

Technologist in Cybersecurity FIAP 02/2025 – 12/2026 · In progress

Certifications
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  • CWHI — Crowsec Web Hacking Initial · Hacking Club

  • eWPTX — Web Application Pentester eXtreme · eLearnSecurity

  • eJPT — Junior Penetration Tester · eLearnSecurity

  • CRTA — Certified Red Team Analyst · CyberWarFare Labs

  • FIAP Certified Cybersecurity Professional · FIAP

  • FIAP Certified Information Security Professional · FIAP

Achievements
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  • 1st place — Hack The Boo CTF 2025 (Brazil)
  • 1st place — CTF BsidesBSB
  • 1st place — CTF Cyber Arena NEXT FIAP 2025
  • 1st place — FIAP CTF Rankings (2nd semester)
  • 3rd place — FIAP CTF Rankings (1st semester)
  • 8th place nationally — 4th Hackers do Bem CTF
  • Holo Rank — Hack The Box (Season 9)
  • Co-founder — UnB Offensive Security Group

Contact
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