Arno Dorian

CompTIA Security+ certified IT and network support professional with enterprise experience troubleshooting Cisco switch connectivity, TCP/IP and DNS issues, Windows/Linux endpoints, and user access problems. Hands-on experience configuring network switches, validating network changes, documenting incidents in ServiceNow, and collaborating with technical teams to restore connectivity. Skilled in Wireshark, Nmap, SSH/PuTTY, Netcat, PowerShell, Bash, and systematic fault isolation; familiar with cloud operations and monitoring concepts.

Network Analyst I / Lifecycle Support at Texas Children’s Hospital (2025-02 – 2026-10)

• Investigated endpoint and network connectivity incidents, isolated causes, tested fixes, and documented troubleshooting steps and resolutions in ServiceNow.
• Configured Cisco network switches and supported switch-port activation, port connectivity troubleshooting, network drops, TCP/IP/DNS diagnostics, and post-change validation in a healthcare environment.
• Supported Windows device imaging and deployment, Active Directory, Group Policy, account access requests, and troubleshooting under enterprise change-control procedures.
• Coordinated with network and systems teams on escalations, providing switch-port, endpoint, and connectivity findings to support timely issue resolution.
• Used Wireshark, traceroute, Netcat, SSH/PuTTY, PowerShell, and Linux/WSL to diagnose network and system faults; assisted users with follow-up technical issues.

IT Network Support Technician at Keystone Advisors (2024-01 – 2025-02)

• Supported network infrastructure and Windows/Linux endpoints, including structured cabling, network drops, patch panels, switch connectivity, and physical-layer fault isolation.
• Used Nmap, Wireshark, Netcat, SSH/PuTTY, Telnet, and traceroute for network discovery, service checks, packet inspection, and connectivity troubleshooting.
• Used Linux/WSL and PowerShell for command-line network diagnostics, basic systems administration support, and repeatable troubleshooting tasks.
• Recorded technical findings, communicated status, and escalated network or infrastructure issues requiring further analysis.

Junior Cloud Administrator Intern at UnitedHealthcare (2023-04 – 2024-01)

• Supported cloud operations involving access requests, virtual resources, configuration reviews, and recurring operational checks under senior administrator guidance.
• Assisted with health and security monitoring by identifying access or configuration issues, documenting findings, and escalating service-affecting anomalies.
• Supported troubleshooting and documentation for cloud-hosted systems, account/access requests, and configuration changes while following enterprise procedures.

Independent Security Researcher at Bugcrowd & HackerOne

Security Research

• Performed authorized web and application security research through Bugcrowd and HackerOne, including private collaboration opportunities involving Palo Alto Networks and Okta programs.
• Conducted threat-hunting activities by examining application behavior, exposed services, authentication flows, network indicators, and anomalous patterns to identify potential security weaknesses.
• Worked with honeypot environments to observe suspicious behavior and attack patterns, analyze indicators, and strengthen understanding of detection, attacker techniques, and defensive monitoring.
• Documented reproducible findings, supporting evidence, potential impact, and remediation context for responsible vulnerability reporting.

Bachelor’s Degree in Computer Information Systems, Cybersecurity Focus – California Institute of Arts & Technology (CIAT) (2026)

Associate of Applied Science in Computer Information Systems, Networking – CIAT (2025-02)