ICT Technician | CompTIA Security+ | Microsoft 365 & Active Directory Labs | Identity, Device Management & Enterprise IT Administration
I work in data center operations and continuously build hands-on labs to strengthen my skills in enterprise IT administration.
My focus is on Microsoft environments including Active Directory, Microsoft 365, identity management, device management, and enterprise infrastructure. I use home labs to simulate real-world administrative scenarios involving user management, security policies, device enrollment, troubleshooting, and collaboration services.
My goal is to continue developing practical experience in enterprise IT environments while progressing toward system administration and cloud administration roles.
• Active Directory administration
• Microsoft 365 administration
• Microsoft Entra ID identity management
• Windows Server configuration
• User and group lifecycle management
• Microsoft Intune device management
• DNS configuration and troubleshooting
• Endpoint device administration
• Network fundamentals and troubleshooting
• Enterprise infrastructure lab design
A small enterprise-style Windows Server environment built using Windows Server 2025 and a Windows 11 client workstation to simulate common IT administration tasks.
Key implementations:
• Domain Controller deployment
• DNS configuration
• Organizational Unit (OU) structure
• Security groups and role-based access control (RBAC)
• User lifecycle management (create, reset password, disable accounts)
• Domain-joined Windows 11 client workstation
• Role-based shared folder permissions
Project documentation and screenshots:
https://github.com/kelvinmarcar/active-directory-home-lab
Hands-on Microsoft 365 enterprise administration lab covering identity management, security configuration, device management, and collaboration services.
Key implementations:
• Microsoft Entra ID user and group management
• Multi-Factor Authentication (MFA) configuration
• Conditional Access security policies
• Microsoft Intune device enrollment and compliance
• Windows 11 device management
• Exchange Online shared mailbox configuration
• Microsoft Teams collaboration channels
• Microsoft Defender monitoring
• Entra ID sign-in log auditing
Project documentation and screenshots:
https://github.com/kelvinmarcar/microsoft-365-enterprise-admin-lab
Hands-on IT support lab demonstrating structured troubleshooting across Windows and Linux systems in a simulated enterprise environment.
Key implementations:
• Windows performance diagnostics using Task Manager and Event Viewer
• DNS troubleshooting across Windows and Linux systems
• Investigation and resolution of IPv6 DNS precedence issues
• DHCP service verification on Windows Server
• Remote server support using SSH on Ubuntu Server
• Network diagnostics using ping, ipconfig, nslookup, and dig
• System security verification and infrastructure validation
Project documentation and screenshots:
https://github.com/kelvinmarcar/enterprise-it-troubleshooting-lab
Enterprise network troubleshooting lab demonstrating structured OSI-layer diagnostics across Windows, Linux, and network infrastructure.
Key implementations:
• DNS failure investigation and hostname resolution troubleshooting
• Network diagnostics using ping, nslookup, ipconfig, and routing analysis
• Firewall verification and infrastructure validation using pfSense
• Linux network diagnostics and system-level troubleshooting
• DNS forwarder configuration and enterprise DNS troubleshooting
• Root cause analysis and corrective network configuration
• Final infrastructure verification and connectivity validation
Project documentation and screenshots:
https://github.com/kelvinmarcar/enterprise-network-troubleshooting-lab
• CompTIA Security+
• CompTIA Network+
• CompTIA A+
• ISC2 Certified in Cybersecurity (CC)
• Microsoft Azure Fundamentals (AZ-900)
• Microsoft 365 Fundamentals (MS-900)
• Google IT Support Professional Certificate
I am currently focused on building practical experience in:
• IT Support and Infrastructure Administration
• Windows Server and Active Directory environments
• Microsoft 365 administration
• Identity and access management
• Device management and endpoint administration
• Enterprise troubleshooting and system diagnostics
Target roles include:
• IT Support Technician
• IT Technician
• Junior System Administrator
• Junior Cloud Administrator
• Microsoft 365 Administrator (Entry Level)
