Hello, I'm Edmund Dionisio

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IT Networking Professional with over a decade of hands-on experience, currently specializing in network infrastructure and transitioning to cybersecurity. Based in Houston, Texas.

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About Me

I'm a passionate IT professional with over 10 years of comprehensive experience spanning hardware, systems administration, helpdesk support, and network infrastructure.

My journey in IT began building custom computers in a manufacturing environment, which gave me deep hardware knowledge. I progressed through roles as a systems administrator for a construction company, helpdesk technician, and desktop support specialist before finding my passion in networking.

For the past year, I've been working as a Networking Technician, where I've developed strong skills in network infrastructure, troubleshooting, security implementation, and network automation. I'm now actively transitioning into cybersecurity, combining my networking expertise with security best practices.

I maintain an extensive homelab environment where I continuously experiment with new technologies, practice security hardening, and develop automation scripts. This hands-on approach allows me to stay current with industry trends and develop practical skills that translate directly to production environments.

10+ Years Experience
Multiple IT Disciplines
Active Homelab Projects

Professional Experience

Networking Technician

Current - 1 Year
  • Design, implement, and maintain network infrastructure including switches, routers, and firewalls
  • Configure VLANs, routing protocols, and network segmentation for improved security
  • Troubleshoot complex network issues using protocol analyzers and monitoring tools
  • Implement network security policies and access control lists (ACLs)
  • Document network topology, configurations, and standard operating procedures
  • Collaborate with security team on vulnerability assessments and remediation

Desktop Support Specialist

Previous Role
  • Provided tier 2/3 technical support for Windows and Linux systems
  • Managed user accounts, permissions, and group policies in Active Directory
  • Deployed and configured workstations, laptops, and peripherals
  • Implemented security patches and software updates across enterprise environment
  • Created technical documentation and knowledge base articles

Helpdesk Technician

Previous Role
  • Delivered first-line technical support via phone, email, and ticketing system
  • Diagnosed and resolved hardware, software, and network connectivity issues
  • Managed incident tickets with focus on timely resolution and customer satisfaction
  • Escalated complex issues to appropriate technical teams
  • Maintained 95%+ customer satisfaction rating

Systems Administrator

Small Construction Company
  • Sole IT administrator responsible for entire company infrastructure
  • Managed Windows Server environment, email systems, and file servers
  • Implemented backup solutions and disaster recovery procedures
  • Configured and maintained network equipment and internet connectivity
  • Provided end-user support and training for construction software
  • Managed vendor relationships and IT budget

Computer Builder

Manufacturing Facility
  • Assembled custom computers to exact specifications in production environment
  • Performed hardware testing and quality assurance
  • Installed and configured operating systems and software
  • Diagnosed and resolved hardware compatibility issues
  • Maintained detailed assembly and testing documentation

Technical Skills

Networking

Routing Protocols (OSPF, EIGRP, BGP)
Switching & VLANs
TCP/IP & Subnetting
Network Troubleshooting
Wireless Networking

Security

Firewall Configuration (pfSense, Cisco ASA)
Network Security & ACLs
VPN Implementation
Security Hardening (Linux, Network Devices)
IDS/IPS (Snort, Suricata)

Systems & Cloud

Linux Administration (Ubuntu, CentOS)
Windows Server & Active Directory
Docker & Containerization
Virtualization (Proxmox, VMware)
Cloud Platforms (AWS, Azure basics)

Automation & Tools

Python Scripting
Bash Scripting
Git Version Control
Wireshark & Packet Analysis
Network Monitoring (Nagios, Zabbix)

Certifications & Training

This section showcases professional certifications. Add your certifications here as you earn them.

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Add your Cisco CCNA, CompTIA Network+, Security+, or other certifications here

Coming Soon

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Security certifications like CEH, CISSP, or cloud certifications

In Progress

Training Courses

Udemy, Pluralsight, or other online training completions

Ongoing

Homelab Projects

Hands-on projects from my homelab environment demonstrating practical skills in networking, security, and infrastructure. Each project includes detailed documentation, network diagrams, and lessons learned.

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Enterprise Network Lab

Multi-VLAN network setup with pfSense firewall, managed switches, and segmented security zones. Implements best practices for network segmentation and access control.

pfSense VLANs Network Security
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Ubuntu Server Hardening

Comprehensive security implementation including UFW firewall with Cloudflare IP restrictions, Fail2ban intrusion prevention, AIDE file integrity monitoring, and automated security logging.

Linux Security UFW/Fail2ban
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Add Your Project

Use the newcontent-template.md guide to add your homelab projects here. Include network diagrams, configuration files, and detailed documentation of your setup and troubleshooting process.

Template Documentation
Coming Soon

Get In Touch

Let's Connect

I'm actively seeking opportunities in cybersecurity and network security roles. Whether you have a position available, want to discuss technology, or just want to connect, I'd love to hear from you.

Location

Houston, Texas

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