Network security operations
Firewall, access, and policy work in production.
Policy design, segmentation, remote access, VPN, URL filtering, and the ongoing tuning that keeps controls useful after rollout.
Network & Security Engineer
James Cadena
Infrastructure across networks, systems, and security.
I build and run infrastructure that has to stay secure, reliable, and usable in production. I keep the stack current without adding avoidable failure modes.
Multi-site
Distributed networks
Secure connectivity and policy across production sites.
Zero Trust
Identity-based access
Remote access with less public exposure.
SD-WAN
Network performance
Better latency, stronger resilience, cleaner failover.
Edge APIs
Platforms and APIs
Small APIs, edge logic, and deployment workflows.
Work
Selected work
A few areas where I have had direct responsibility in production.
Global connectivity
Distributed network performance across sites.
WAN and inter-site work focused on latency, resilience, and clean failover between paths.
Zero Trust and identity
Reduce reliance on broad internal trust.
Identity-aware policy and tighter remote-access patterns shrink exposed internal surfaces and narrow who can reach what.
Systems resilience
Build systems that recover cleanly and stay usable.
Backup hardening, observability, virtualization, and recovery planning that keep a system running when something breaks.
Stack
Networks, systems, security, and delivery.
New tools when they fit the environment. Older ones when they still earn their place.
Networks
- Palo Alto NGFW
- SD-WAN
- IPsec VPN
- IPv4/IPv6
- BGP/OSPF
Systems
- Proxmox
- ZFS
- TrueNAS
- Windows Server
- Linux
Security
- Zero Trust
- IDS/IPS
- SSL decryption
- User-aware policy
Cloud and APIs
- Cloudflare Workers
- D1/KV/DO
- Vercel
- Serverless APIs
Approach
Practical infrastructure work.
My background is in networks, systems, and security. I also build small APIs and deployment tooling where it makes the core work easier.
Current
Running production infrastructure and building the tooling that supports it.
Contact
Get in touch
If you are hiring for infrastructure, security, systems, or technical operations, feel free to get in touch — happy to share my resume and references on request. Not hiring? Still happy to talk tech and AI.