Zach Ellerbrook

Résumé

Greater Chicago, IL · active Secret clearance · updated

Navy senior enlisted leader, E-6, 24 years, serving as IT systems technician and security manager liaison. Looking for identity and access management work, and the risk and compliance work past it.

I own network access administration and personnel security tracking for a 35 to 40 person organization: SAAR-N authorization requests, clearance tracking, file-share permissions, and PII handling. I'm also carrying a 32-workstation migration to the Navy's Nautilus environment as the command's sole IT resource, one workstation a day, phased around a live performance schedule. That sits on hands-on Linux administration, a home pentesting lab, and a Python log-analysis tool built from scratch. Active Secret clearance: Tier 3R investigation adjudicated January 2023, Continuous Evaluation since January 2025. My Navy career ends June 30, 2027, and I'm available from late February 2027 through SkillBridge.

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Technical skills

Security. Access control and authorization review (SAAR-N) · Personnel security and clearance administration · Account lifecycle (joiner-mover-leaver) · Least-privilege provisioning · PII handling (Privacy Act) · Log analysis · SOC fundamentals (TryHackMe SOC Level 1) · Network fundamentals (Fortinet) · Vulnerability and exploitation basics (Kali, Metasploit; lab)

Systems. Linux (Arch/CachyOS daily driver, EndeavourOS, Ubuntu Server) · Windows 10/11 · Microsoft 365 and NMCI Flank Speed · VirtualBox

Tools and languages. Python · Bash · Git and GitHub · pytest · SharePoint permissions administration

Experience

IT systems technician and security manager liaison

U.S. Navy, Navy Band Great Lakes, IL · Nov 2025 to present, collateral IT support duties since 2024

Operations coordinator

U.S. Navy, Navy Band Great Lakes, IL · Jun 2025 to Nov 2025, also 2019 to 2020

Command pay and personnel administrator

U.S. Navy, Navy Band Southwest, San Diego, CA · Nov 2020 to Sep 2022

Earlier U.S. Navy assignments

2002 to 2020

Navy recruiter (NRD Chicago, 2014 to 2017; advanced recruiter, 7 Gold Wreath awards) · Command leading petty officer, 36 personnel, zero liberty or safety incidents · Fiscal petty officer, Government Purchase Card program (107 requests, zero discrepancies) · Command career counselor (98% retention) · Supply petty officer ($250K inventory, 100% accountability) · ESAMS safety supervisor (zero discrepancies on annual inspection) · Public affairs supervisor.

Naval Service Training Command Sailor of the Year, FY19. Navy and Marine Corps Commendation Medal. 6 Navy and Marine Corps Achievement Medals. Good Conduct Medal (7).

Projects

ssh-detect-respond

Python · github.com/zellerbrook/ssh-detect-respond

Parses SSH authentication logs into structured events (timestamp, source IP, username, outcome) and tails live files, surviving log rotation and in-place truncation. That is the failure mode where a naive monitor goes silently blind while still looking healthy. It is the log-ingestion layer underneath brute-force detection tools like fail2ban and CrowdSec. The pytest suite covers parsing, rotation, and truncation.

Home pentesting lab

VirtualBox

Kali Linux attacker VM against Metasploitable 2, Windows 7, and Windows 10 targets. Enumeration, exploitation, and post-exploitation practice.

Certifications

TryHackMe SOC Level 1 (2025) · Google Cybersecurity Professional Certificate (2024)

Also held: Google IT Support Professional Certificate (2024) · Fortinet Networking Fundamentals (2025) · TryHackMe Cyber Security 101 (2025) · ZTM Complete Python Developer (2026) · ZTM DevOps Bootcamp, Linux Sysadmin (2026) · ZTM Bash Scripting (2026) · ZTM Introduction to Git and GitHub (2026) · Claude 101 (2026) · Claude Code 101 (2026) · Introduction to Claude Cowork (2026) · Google AI Essentials (2024)

Education

M.S. Education

St. Joseph's College of Maine · 2013, completed while serving full-time

B.M. Jazz Performance

Southern Illinois University Edwardsville · 1999

Contact

zach@zachellerbrook.com