José Álvarez Domínguez

SysAdmin | Network Security & Automation

I specialize in Linux Systems, Network Security, and Python Automation.
I focus on deep troubleshooting and infrastructure reliability from day one.

"I don't just configure networks; I analyze, secure, and automate them."

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Technical Stack

Domain	Proficiency & Tools
Network Analysis	Wireshark (Deep Packet Inspection), Tcpdump (CLI Analysis), Nmap (Network Discovery/Audit)
Network Defense	Suricata (IDS/IPS Basics), ACLs, Port Security, Network Hardening
Core Networking	Cisco IOS (Routing & Switching), VLANs, STP, Subnetting, NAT/PAT
Automation	Python (Netmiko, Requests), Bash Scripting, Automating routine admin tasks
Infrastructure	Linux (Ubuntu Server, RHEL-based), Docker (Containerization), Raspberry Pi Clusters
Dev Tools	PyCharm (Professional IDE), VS Code, Jupyter Notebooks, Git/GitHub, Docker

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Lab Projects (Learning by Doing)

🛡️ Sovereign Vault (3-2-1 Backup Architecture)

Status: Completed & Documented Automated, encrypted hybrid backup infrastructure implementing the 3-2-1 strategy (Home Lab).

• Architecture: Windows 11 Workstation -> Syncthing (Local Sync) -> Raspberry Pi 4 -> Rclone Crypt -> Google Drive.
• Tech Stack: Docker Compose, Bash Automation, Linux Cron, Zero-Knowledge Encryption.

[🏭 Industrial IoT Telemetry System]

End-to-end IoT solution. Sensors capture data via ESP32, transmitted over MQTT to a hardened Raspberry Pi server running a Dockerized ingestion pipeline.

• Skills: IoT Protocols, Linux Hardening, Python.

[🐍 Python Network Automation]

Scripts using Netmiko to interact with Cisco devices. Automates VLAN creation, config backups, and connectivity checks.

• Goal: Moving from manual CLI typing to "Infrastructure as Code".

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Education & Certifications

Formal Education:

• SMR (Sistemas Microinformáticos y Redes) - Technician in Microcomputer Systems and Networks.Studying

Professional Certifications:

1. Google Cybersecurity Professional Certificate V2 - Google
2. CCNA: Introduction to Networks - Cisco
3. CCNA: Switching, Routing, and Wireless Essentials - Cisco
4. Linux Essentials - LPI / Cisco
5. Junior Cybersecurity Analyst Career Path - Cisco
6. Network Technician Career Path - Cisco

Languages:

• Spanish: Native
• English: B1 (Intermediate)

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Ready to Work

Looking for roles in NOC (Network Operations Center), IT Support, or Junior SysAdmin. I bring a security-first mindset and the ability to troubleshoot complex issues using CLI tools.

• Email: contacto@netmiko.io
• LinkedIn: José Álvarez (jadomin)