Systems Administrator It Manager
Resume:
David Rosales
Las Vegas, NV *****
Email: ******.****@*****.***
GitHub: github.com/TheHackersWorkshop
Professional Summary
Experienced IT Leader, Electronics Engineer, and U.S. Patented Inventor (No. 12,351,126) with over 30 years of hands-on expertise in IT infrastructure, embedded systems, and hardware development. Known for delivering practical, high-reliability solutions in system administration, security engineering, and product prototyping. Creator of the Catalytic Converter Alarm System (CCAS), now officially patented, and developer of multiple open-source tools that improve monitoring, diagnostics, and automation across Linux environments. Proven ability to lead projects from concept through deployment, mentor cross-functional teams, and design secure, scalable systems tailored to real-world needs. Actively seeking leadership roles such as IT Manager, Systems Administrator, or CTO, where broad technical depth and field-tested experience can make an immediate impact. Technical Skills
IT Management & Leadership
Led cross-functional teams in both infrastructure and product development initiatives.
Negotiated vendor contracts and managed stakeholder relationships.
Mentored IT and engineering personnel, increasing productivity by 20%. Systems & Network Administration
Architected enterprise networks with Active Directory, VPN, DHCP, and DNS services.
Extensive Linux and Windows Server experience in production and hybrid environments.
Administered virtualized environments with VMware ESXi, Hyper-V, and Proxmox.
Managed secure and scalable cloud infrastructure including Cloudflare and self-hosted automation.
Security & Automation
Designed and deployed custom hardware/software security systems (e.g., CCAS, MAPS).
Developed automation tools using Python and Bash to simplify network diagnostics and permissions auditing.
Created reusable Linux command alias frameworks to improve cross-platform efficiency. Embedded Systems & Hardware
Programmed microcontrollers including Arduino, ESP32, and ATTiny/ATMega.
Designed and fabricated PCBs with EasyEDA; deployed embedded security systems for field use.
Built electronic kits for educational and commercial applications. Software & Development Tools
Languages: Python, C++, Java
Tools: Git, Docker, Kubernetes, Arduino IDE, Android Studio
Automation & Monitoring: Custom tools include Watcher.py, permissions_check, Net.sh, systemctl-control, and more.
Project Tools: GitHub, Trello, Slack
Design & Content Creation
3D Design (FreeCAD), Image Editing (GIMP), Video Production (OBS, Kdenlive)
Created instructional resources and marketing content for technical outreach Work History
Lead Developer & Founder Reimagined Innovations LLC 03/2022 to 07/2024
Engineered the Catalytic Converter Alarm System (CCAS), managing full lifecycle from ideation through manufacturing, reducing theft incidents across client deployments.
Directed development of the Municipal Asset Protection System (MAPS), securing city infrastructure against copper theft.
Expanded security offerings into pool equipment markets, establishing pilot programs and partnership agreements with two major firms.
Led embedded engineering efforts and product prototyping, reducing production lead times by 20%.
Lead Engineer & Founder The Hackers Workshop LLC 07/2020 to 10/2021
Developed educational electronics kits and created a public-facing workshop to promote community learning.
Built open-source tooling including interactive system scripts, games, and diagnostic menus.
Managed all phases of product lifecycle, from technical design to community engagement and sales growth.
IT Administrator & Electronics Engineer NDA Project 04/2009 to 12/2019
Directed a long-term technical engagement supporting infrastructure modernization, network security, and embedded systems for confidential clients.
Led a continuous internal technical education initiative, designing training workflows and integrating new technologies into operational pipelines, fostering cross-disciplinary innovation.
Maintained enterprise IT infrastructure across Linux and Windows environments, ensuring 99.9% uptime and strict compliance with evolving security requirements.
Served as the lead for R&D integration, consistently bridging the gap between emerging technologies and practical deployment across hybrid environments. Owner/Field Technician ECR Networks 09/1994 to 04/2009
Provided network and IT support for home and small business clients.
Deployed server and workstation builds, and maintained both Linux and Windows platforms.
Enhanced performance and client satisfaction with tailored support and systems tuning. Network Administrator VM Direct 05/2000 to 12/2006
Oversaw Active Directory, and DNS for over 5000 enterprise clients.
Reduced downtime by 15% through hardware and software upgrades.
Led network security efforts to improve system hardening and incident response. Education & Continuous Learning
Linux Systems Administration: Active use since 1997, including enterprise production deployments across multiple distributions.
Windows Server Administration: Expert-level on-the-job training with server roles and Active Directory domains.
Embedded Development: Self-directed study and deployment of IoT and microcontroller projects.
Java Programming: Formal coursework completed in 2000, used in professional and hobbyist projects.
Certifications:
o CompTIA A+ Certified (2000)
o Additional training in networking, cybersecurity, and embedded systems engineering.
Issued U.S. Patent No. 12,351,126 (July 8, 2025) for an alarm system and method detecting catalytic converter or mechanical part removal, demonstrating innovation in hardware security design.
Open Source Projects
GitHub: github.com/TheHackersWorkshop
Linux-Command-Aliases-Collection: Custom aliases and functions designed for portability across Linux distros.
Watcher.py: Terminal-based system monitoring tool built in Python.
Interactive-dig-Menu: A user-friendly DNS query tool for sysadmins.
Nettools_bash & Net.sh: Network diagnostic menus for real-time interface and connection inspection.
permissions_check & Cron.sh: Scripting utilities for access control and scheduled task verification.
Forgotten_ship & Dark_journey: Text-based Python games emphasizing command-line creativity.
Computer-brain: A 6502-based LED matrix project demonstrating low-level hardware control.
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