Systems Engineer × Security Specialist

Matthew McLellen

🔐 TS/SCI Clearance Active
🎓 CompTIA Security X Certified

20 years securing critical infrastructure, managing enterprise networks, and building resilient systems. Navy Veteran turned Systems Engineer with zero tolerance for security incidents.

Matt McLellen
💻 20 Years
Experience

About Me

From submarines to servers, building secure systems that matter

Hey there! I'm Matt, a systems engineer who spent two decades in the Navy before transitioning to civilian tech. I've secured everything from submarine networks to enterprise cloud infrastructure.

My superpower? Taking complex security requirements and translating them into rock-solid implementations. Whether it's COMSEC management, STIG compliance, or standing up virtualized environments, I've done it at scale with zero incidents.

Currently diving deep into the cloud-native world, learning Kubernetes, Ansible, and Terraform. When I'm not configuring switches or hardening systems, you'll find me experimenting with air fryer recipes or helping friends troubleshoot their tech.

20
Years Experience
1000+
Personnel Managed
500+
Workstations Secured
0
Security Incidents

Experience

Building secure systems across military and civilian sectors

January 2024 - Present
Rite-Solutions | NUWC
Systems Engineer

Engineering and securing submarine network subsystems for the Naval Undersea Warfare Center. Managing virtualized Windows domains and implementing security updates across critical infrastructure.

  • Deploy security patches maintaining 100% STIG compliance across 15+ critical systems
  • Manage Windows Server 2016/2019/2022, RHEL, and VMware ESXi environments
  • Integrate Ansible ADP deployments for submarine network automation
  • Implement NIST/RMF security frameworks for classified networks
May 2004 - May 2024
United States Navy
Primary COMSEC Manager | Security Manager | Department Chief

Led communications security and network operations across multiple commands. Managed three large COMSEC accounts with zero security incidents over 20 years.

  • Primary COMSEC Manager: 8 years managing 3 accounts, 0 incidents during audits
  • Secured 500+ workstations and peripherals maintaining compliance and uptime
  • Managed security clearances for 1000+ personnel through JPAS/DISS systems
  • Stood up and maintained two classified document control systems (all classification levels)
  • Led teams maintaining critical submarine LAN and communications equipment at sea
  • Developed SOPs for critical network systems still in use fleet-wide

Technical Arsenal

Tools and technologies I work with daily

🔒

Security & Compliance

COMSEC STIGs NIST RMF TS/SCI IDS Security+
💻

Systems & Platforms

VMware ESXi Windows Server RHEL Linux Microsoft 365 Active Directory
🌐

Networking

Cisco Switches Firewalls TCP/IP VLANs Network Security TFTP
⚙️

Automation & DevOps

Ansible Kubernetes Terraform Docker CI/CD AWS

Current Projects

Building and learning in public

☸️

Kubernetes Homelab

🚀 Active Development

Building a personal Kubernetes cluster to master cloud-native technologies. Deploying applications with Helm, implementing CI/CD pipelines, and learning infrastructure as code with Terraform and Ansible.

Kubernetes Ansible Terraform Docker GitOps
🔧

Network Automation Scripts

💡 Learning Project

Collection of automation scripts for common network administration tasks. Automating Cisco switch configurations, backup routines, and compliance checks to reduce manual work and human error.

Python Ansible Bash Cisco IOS

Let's Connect

Looking for a systems engineer who takes security seriously? Need help with network infrastructure or compliance challenges? Or just want to talk tech? I'd love to hear from you.