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cmcabrera-tech/README.md

Hi, I'm Carlos Cabrera 👋

CompTIA A+ | IT Support | Windows Administration | Active Directory | Networking

IT professional with a background in Computer Engineering and hands-on experience in IT support, systems administration, troubleshooting, and virtualized lab environments.

Focused on strengthening practical expertise in Windows administration, Active Directory, networking, automation, and IT support operations.

🛠️ Core Technical Skills

  • Operating Systems: Windows 10/11, Windows Server, Linux
  • IT Support: Hardware & Software Troubleshooting, Help Desk, Ticketing Systems, Incident Management
  • Microsoft: Active Directory, Group Policy, Microsoft 365
  • Networking: TCP/IP, DNS, DHCP, VPN, OSI Model
  • Virtualization: Hyper-V
  • Security: MFA, SSO, Anti-malware, Basic System Hardening
  • Automation: PowerShell
  • Databases: SQL, MySQL, MariaDB
  • Development: C#, JavaScript, HTML, CSS, PHP

🎓 Certifications

  • CompTIA A+

🚀 Featured Projects

Built a small business Windows domain from the ground up using Windows Server 2022, Windows 11 Pro, Hyper-V, Active Directory Domain Services, DNS, DHCP, Group Policy, SMB shares, and NTFS permissions.

Key skills: Active Directory · Windows Server · DNS · DHCP · Group Policy · Hyper-V · Access Control · Troubleshooting

➡️ View Project

Built a cloud-managed Windows 11 enterprise environment using Microsoft Entra ID, Microsoft Intune, Microsoft Defender, and Conditional Access to centrally manage identities, devices, compliance, security policies, application deployment, and Windows updates.

Key skills: Microsoft Entra ID · Microsoft Intune · Microsoft 365 · Microsoft Defender · Conditional Access · Endpoint Management · Compliance Policies · Windows Update Rings · PowerShell

➡️ View Project

Developed reusable PowerShell automation workflows to streamline common Active Directory administration tasks, including inventory collection, bulk user provisioning, password management, employee offboarding, audit logging, and HTML reporting.

Key skills: PowerShell · Active Directory · Windows Server · Automation · User Lifecycle Management · CSV Processing · HTML Reporting · Audit Logging

➡️ View Project

Built a local, human-in-the-loop AI assistant to support Tier 1 IT technicians with incident triage, semantic knowledge retrieval, diagnostic guidance, safe command recommendations, and escalation decisions.

The project uses Python, Streamlit, Ollama, Retrieval-Augmented Generation (RAG), vector embeddings, and a SQLite-backed knowledge index to analyze incidents across Windows, Active Directory, networking, and Microsoft Intune scenarios while keeping technician approval in the loop.

Key skills: Python · RAG · Ollama · Streamlit · SQLite · Semantic Search · IT Incident Triage · Knowledge Management · PowerShell Diagnostics · Human-in-the-Loop AI

➡️ View Project

Built a segmented small-business network using pfSense and Hyper-V, separating corporate and guest traffic into independent subnets with controlled internet access, firewall rules, NAT, DHCP, DNS, and guest isolation.

Key skills: pfSense · Network Segmentation · TCP/IP · DHCP · DNS · NAT · Firewall Rules · Hyper-V · PowerShell · Network Troubleshooting

➡️ View Project

Built a self-hosted Help Desk environment using osTicket on Ubuntu Server to simulate real-world IT support operations, including ticket management, SLA configuration, role-based access, Tier 1 troubleshooting, Tier 2 escalation, and incident resolution.

Key skills: Help Desk · osTicket · Incident Management · SLA · Troubleshooting · Linux · Apache · MariaDB · Tier 1/Tier 2 Support

➡️ View Project

🎯 Current Focus

Continuously strengthening my technical expertise through hands-on labs, troubleshooting scenarios, automation, and IT projects.

  • Windows and Windows Server Administration
  • Active Directory and Group Policy
  • Networking and Network Troubleshooting
  • PowerShell and IT Automation
  • Linux System Administration

📫 Connect with Me

Pinned Loading

  1. active-directory-home-lab active-directory-home-lab Public

    Small business Windows domain lab built with Hyper-V, Windows Server 2022, Active Directory, DNS, DHCP, Group Policy, and SMB.

  2. help-desk-ticketing-lab help-desk-ticketing-lab Public

    Self-hosted Help Desk lab using osTicket, Ubuntu Server, Apache, MariaDB, and PHP with Tier 1/Tier 2 incident workflows and troubleshooting.

  3. microsoft-entra-intune-endpoint-lab microsoft-entra-intune-endpoint-lab Public

    Cloud identity and endpoint management lab using Microsoft Entra ID, Intune, Conditional Access, and Windows 11.

  4. powershell-it-support-automation-lab powershell-it-support-automation-lab Public

    PowerShell automation lab for Active Directory administration, user lifecycle management, audit logging, and IT support workflows.

    PowerShell

  5. pfsense-network-segmentation-lab pfsense-network-segmentation-lab Public

    Hands-on pfSense network segmentation lab using Hyper-V, firewall rules, NAT, DHCP, DNS, guest isolation, and PowerShell network validation.

  6. ai-powered-it-support-assistant ai-powered-it-support-assistant Public

    Local AI-powered IT support assistant using Python, Streamlit, Ollama, RAG, SQLite vector search, and human-in-the-loop safety controls.

    Python