├─ Linux & Unix Systems (30+ years)
│ ├─ Early Internet Infrastructure (Pre-1.0 Linux)
│ ├─ System Architecture & Design
│ ├─ Virtualization & Containerization
│ └─ Performance Optimization & Scaling
├─ Infrastructure & DevOps
│ ├─ Distributed Systems Architecture
│ ├─ Network Design & Implementation
│ ├─ Critical Infrastructure (Energy, Government)
│ └─ High-Availability Systems (99.9%+ uptime)
├─ Development & Automation
│ ├─ Python/Node.js/Bash Development
│ ├─ AI/ML Pipeline Architecture
│ ├─ API Design & Integration
│ └─ Infrastructure as Code
└─ Specialized Technologies
├─ VoIP & Telecommunications
├─ GPU-Accelerated Computing
├─ Security & Compliance (NIST, Federal)
└─ MCP Protocol & Distributed AI Systems