Julian Purgahn

Summary

Aspiring cybersecurity professional with a focus on blue team operations and MDR. Current IT professional with hands-on experience providing 24/7/365 support to over 10,000 end-users across 90+ locations. Strong background in help desk operations, hardware/software troubleshooting, network troubleshooting, ticket management, and customer support. Strong foundational knowledge in InfoSec including traffic and log analysis, SIEM monitoring and rule creation, Endpoint Detection and Response (EDR), threat hunting using frameworks such as MITRE ATT&CK and the Cyber Kill Chain. Excellent problem-solving skills. Open-minded, passionate, and eager to learn.

Experience

IT Helpdesk Technician - Berkshire Hathaway Automotive (TX)

Sep 2024 - Present

• Provided 24/7/365 technical support to over 10,000 end-users in 93 locations, troubleshooting hardware, software, and network issues in a fast-paced environment.
• Created, managed, and prioritized service requests for the Helpdesk, Systems, and Networks teams.
• Interfaced directly with customers and internal teams to resolve hardware, software, and network connectivity issues, both remote and onsite.
• Leveraged SIEM to investigate alerts, analyze logs, and generate scheduled reports.
• Assisted in Endpoint Detection and Response (EDR) management and monitored MDR cases.
• Managed Active Directory infrastructure including user account provisioning, group policies, OU structures, and permission management for large-scale Windows domain environment
• Administered enterprise software deployment using PDQ for automated package distribution and maintained comprehensive IT asset inventory and Microsoft licensing compliance

Home Lab – Personal Infrastructure & Security Lab

Sep 2024 - Present

• Developed and deployed full-stack web application using Flask/Python backend and responsive frontend, hosted on self-managed Ubuntu servers.
• Built virtualized Security Operations Center (SOC) using Security Onion on Proxmox hypervisor for threat detection, network monitoring, and incident response training with Elastic Stack integration.
• Simulated attack scenarios (PowerShell abuse, lateral movement, persistence) to test detection and hunting skills.
• Managed Proxmox virtualization cluster hosting multiple VMs with proper resource allocation, network isolation, and secure remote access via SSH/VPN integration.

Core Competencies

Education

University of North Texas | Denton, Texas – May 2024

Bachelor of Science | Cybersecurity | ABET Accredited