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johninfra/README.md

John Tyler

Systems Administrator | IAM | Cybersecurity

CompTIA Security+ and A+ certified systems and cybersecurity professional with hands-on experience administering Active Directory, Microsoft Entra ID, Microsoft 365, Windows endpoints, and identity and access management environments.

My experience includes user lifecycle management, RBAC and least-privilege access, authentication troubleshooting, endpoint support, VPN and network connectivity, PowerShell automation, and security incident investigation. I progressed from Tier 1 support into identity, access, and systems administration responsibilities while supporting production enterprise environments.

This GitHub documents hands-on projects across Entra ID IAM, Active Directory, Windows Server, Linux, PowerShell, Intune, Group Policy, VMware, Splunk SIEM, networking, and infrastructure security. Projects include technical documentation, implementation details, screenshots, and practical enterprise scenarios.

🛠️ View my Hands-On Lab Portfolio


Technical Skills

Category Technologies & Tools
Identity & Access Management Microsoft Entra ID, Active Directory (AD DS), IAM, RBAC, Security Groups, User Lifecycle Management, Least Privilege
Microsoft Administration Microsoft 365, Microsoft Intune, Group Policy (GPO), Windows Server 2022
Operating Systems Windows 10/11, Windows Server 2022, Ubuntu, Kali Linux
Automation & Scripting PowerShell, Windows CMD
Networking TCP/IP, DNS, DHCP, VPN, SMB
Security & Monitoring Splunk SIEM, Wireshark, Nmap
Virtualization VMware Workstation
Remote Administration RDP, Quick Assist
IT Operations Troubleshooting, Incident Management, Technical Documentation

Featured Projects

Microsoft Entra ID IAM Fundamentals Lab

Built and documented a simulated enterprise Microsoft Entra ID environment demonstrating cloud identity administration and IAM best practices.

  • Provisioned 10 cloud users
  • Created 15 role-based security groups
  • Implemented role-based access control (RBAC)
  • Applied least-privilege access principles
  • Managed user provisioning and identity lifecycle operations
  • Configured security group membership and access structure
  • Documented the environment and implementation process

Splunk SIEM Security Monitoring & Log Analysis

Built a Splunk SIEM lab to centralize, search, and analyze security and system event data for operational and security monitoring.

  • Ingested and analyzed over 69,000 events across hundreds of hosts
  • Used Splunk Search Processing Language (SPL) to investigate system and security activity
  • Analyzed Windows and PowerShell-related events to identify notable activity and patterns
  • Applied SIEM, log analysis, and security-monitoring techniques
  • Created targeted searches to support troubleshooting, investigation, and incident analysis

Featured Repositories

  • IT Support, IAM, & Cybersecurity Labs: Hands-on simulations featuring Active Directory provisioning, network troubleshooting, network packet analysis, and endpoint security hardening.

IT Support, IAM, & Cybersecurity Labs

26 enterprise-focused hands-on labs demonstrating:

  • Identity & Access Management: Microsoft Entra ID, Active Directory, security groups, RBAC, and least-privilege administration.
  • Enterprise Infrastructure: Windows Server, Group Policy, PowerShell automation, virtualization, and endpoint management.
  • Security Operations: Splunk SIEM, Sysmon, Windows Event Logs, vulnerability management, and incident investigation.
  • Networking: TCP/IP, DNS, DHCP, VPNs, Wireshark, Nmap, and enterprise network troubleshooting.

Certifications

✔ CompTIA Security+

✔ CompTIA A+


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