About

About

Howdy! My name is Diego Espina! I am a former electrical engineer, life long computer nerd, and aspiring cyber security professional currently seeking an entry level/early career role. I enjoy all things cyber-related, from penetration testing, to forensics, to infrastructure and cloud, and am always trying to learn as many new things as I can.

While learning how to work with AWS I figured I might as well put my knowledge to use and came up with this website as a place to store all my CTF writeups. The entire back end is managed through Amazon Web Services and the front end is managed by Jekyll, with plenty of little custom made scripts along the way to help me automate things.

I’m always looking to network and meet new people in the cybersecurity community, so feel free to always reach out via any of my socials on the side bar.

Education and Certifications

BS in Electronic Systems Engineering Technology with a minor in Cybersecurity from Texas A&M University
GCIH - GIAC Certified Incident Handler (Credly Link)
GSEC - Security Essentials Certification (Credly Link)
GFACT - GIAC Foundational Cybersecurity Technologies (Credly Link)

Skills

Programming/Scripting Languages: Python, C/C++, Visual Basic, Bash, AWS CLI, HTML, CSS
Frameworks and Models: OSI Model, TCP/IP Model, MITRE ATT&CK, OpenCTI, Cyber Killchain, OWASP Top 10, Zero-trust Architecture, Defense in Depth
Cybersecurity Tools: Nmap, Metasploit, Burp Suite, Wireshark, Curl, Nessus, Yara, Zeek, Snort, Hydra, Netcat, Hashcat, Autopsy
Exploit Methods: LFI/RFI, Command Injection, SSRF, SSTI, SQLi, RCE, Directory Traversal, XSS, Hash Cracking, SUID Exploitation, Memory Overflow
General Skills: Spanish (Fluent), Digital Logic, Binary Arithmetic, Computer Networking, Network Enumeration, DFIR, Packet Analysis, SIEM, Technical Writing, Memory Analysis

CTF Achievements

Hack The Box (profile)

  • Hacker Rank
  • Top 900 Global Rank
  • 14 Machines Owned (12 linux, 2 Windows)
  • 28 Challenges completed (6 web, 3 reversing, 1 crypto, 3 misc, 6 coding, 6 OSINT, 1 gamepwn, 2 hardware)

Try Hack Me

TryHackMe

Hack The Box Holmes CTF

  • Rank 103 of 7084
  • 65/65 flags found as team, 8 flags found individually

Huntress CTF 2025

  • Rank 240 out of 6933
  • 42 flags found as a team, 8 flags found individually