Open to opportunities

Robert Marnell

@robertmarnell

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Infrastructure operations specialist pivoting into cybersecurity and penetration testing.

United States

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What I'm looking for

I’m looking for a role where I can apply hands-on penetration testing and security operations—vulnerability assessment, network monitoring, and incident response—while continuing to harden systems and automate secure deployment with clear risk-mitigation reporting.

I’m a solutions-driven Infrastructure Operations Specialist transitioning into Cybersecurity and Penetration Testing, with a 10-year track record in complex network diagnostics, root-cause vulnerability isolation, and secure asset lifecycle deployment. I bridge business requirements and technical enforcement to mitigate both operational and security risks, backed by hands-on lab work in ethical hacking frameworks, network defense, and system security administration.

In recent roles, I architected a corporate rollout to deploy telemetry tracking software across 175 field hardware endpoints and partnered with client enterprise IT teams to whitelist hardware MAC addresses across perimeter firewalls. I also engineered a centralized Asset Registry Database (Excel) for security/operational metadata and built rigorous change-management workflows to keep client NAC access stable during hardware replacements. Alongside this, I conduct vulnerability analysis with Nessus and Nikto, perform SQL injection testing in DVWA, troubleshoot and monitor networks with Wireshark and IDS/syslog auditing, and implement cryptography with OpenSSL-generated X.509 certificates.

Experience

Work history, roles, and key accomplishments

Systems Ops & Compliance Coordinator

MH Equipment

Aug 2023 - Feb 2025 (1 year 6 months)

Architected and executed a corporate rollout strategy to deploy telemetry tracking software across 175 field hardware endpoints, coordinating technician teams and secure edge-to-server connectivity. Partnered with enterprise IT teams to support network security whitelisting and built a centralized asset registry/CMDB in Excel with change-management processes for MAC address updates.

Excel CMDB Change Management

Infrastructure Diagnostics Supervisor

Combined Enterprise Operations

Dec 2014 - Aug 2023 (8 years 8 months)

Provided tier-1 and tier-2 troubleshooting across integrated electrical, communication, and telemetry hardware networks, isolating root-cause system vulnerabilities and execution failures using proprietary scanning tools. Served as a primary technical support interface for commercial accounts, standardizing incident logbooks and managing warranty infrastructure data while supervising technician co

L1 L2 Diagnostics Proprietary Data Scanning Tools Compliance Auditing

Certified Cybersecurity Technician

EC-Council

Completed EC-Council cybersecurity technician training including ethical hacking, threat prevention, network and endpoint security, cryptography, and incident handling.

Ethical Hacking Endpoint Security Cryptography

Academic & Applied Security Engineering

CSU Global & EC-Council Training

Completed academic and applied security engineering training focused on vulnerability analysis, web application security, network traffic analysis, and access control. Performed hands-on work using common security assessment and defensive tooling.

Nessus Nikto Web Application Security SQL Injection Wireshark VPN IPtables OpenSSL RAID Backup And Recovery

Certificate in Cybersecurity

CSU Global

In-progress cybersecurity certificate covering network monitoring, identity and access management, penetration testing, ethical hacking, data encryption, and Linux tooling. Includes coursework in threat detection and scripting/programming relevant to security operations.

Network Monitoring Identity Management Penetration Testing Ethical Hacking Encryption Linux BASH PowerShell Python OSINT Threat Detection

Education

Degrees, certifications, and relevant coursework

CSU Global

Certificate in Cybersecurity, Cybersecurity

In progress Certificate in Cybersecurity with focus on network monitoring, identity and access management (IAM), penetration testing, ethical hacking, and data encryption, including Linux (Kali) and scripting with Bash, PowerShell, and Python.

EC-Council

Certified Cybersecurity Technician (C|CT), Cybersecurity

Completed Certified Cybersecurity Technician (C|CT) training coursework covering ethical hacking, threat prevention, network and endpoint security, cryptography, and incident handling.