Hello — I'm

Sebastian Duarte-Urbina

Technically adept, results-driven IT professional specializing in cybersecurity — Linux administration, network security, lab automation, and Splunk SIEM.

  • Location: Lawrenceville, GA
  • Open to: Cybersecurity Analyst roles
  • Certifications: CompTIA Security+ (May 2025)

About Me

I’m a cybersecurity-focused IT professional with hands-on experience in Linux administration, network defense, and security tooling. I’ve built virtualized security labs (Active Directory, pfSense, Splunk), supported campus lab operations, and led a student security club that increased participation by 30%.

What I do

Design and operate security labs; analyze logs in Splunk; configure network perimeter security; tutor and lead cybersecurity workshops.

Approach

Practical, measurable security: deploy tools, collect telemetry, build dashboards, and create action-based alerts for incidents.

Selected Projects

Key projects and labs demonstrating hands-on security and network skills.

Virtualized Network Security Lab

Built a virtualized lab environment using VirtualBox, pfSense, Windows Server (Active Directory), and Splunk SIEM. Implemented perimeter firewall rules, Group Policy security controls, and Splunk dashboards to detect brute-force attempts and policy violations.

Tech: VirtualBox · pfSense · Windows Server 2022 · Active Directory · Splunk

Lab Administration & Student Workshops

Maintained 110+ lab machines with 100% uptime, resolved 100+ help-desk requests, and led the delivery of CompTIA Network+ workshops for peers.

Tech: Windows, Linux, Office 365, Remote troubleshooting

ISA Chapter — Leadership & Events

Revitalized the Information Security Association chapter — increased participation by 30%, organized monthly meetings and hosted industry speakers for networking and career development.

Focus: Curriculum design · Event coordination · Community engagement

Skills

Penetration Testing

  • Information Gathering
  • Vulnerability Analysis
  • Exploitation & Reporting
  • Tools: Metasploit, Nmap, Wireshark

Networking

  • TCP/IP · DNS · DHCP
  • Firewalls & VPNs
  • Network Security Principles

Operating Systems

  • Windows Server 2019/2022
  • Windows 10/11 · Linux (Kali, Debian)
  • macOS · iOS

Tools & Productivity

  • Splunk SIEM
  • VirtualBox
  • Microsoft Office 365 (Word, Excel, PowerPoint, Outlook, Teams, SharePoint)

Get in touch

If you’re hiring for cybersecurity, IT support, or want to discuss a lab or workshop — let’s talk.

This form opens your email client. You can also contact me directly at sduarte0@icloud.com.