JHJonathan Hatfield

Systems engineer · Network security

Complex security.
Made practical.

I’m Jonathan Hatfield. I build tools, labs, and technical stories that make network and cybersecurity architecture easier to see, test, and explain.

Start a security conversation ↗See what’s coming ↓
LAB / ACTIVE
01ObserveTelemetry online
02UnderstandContext mapped
03ActPolicy enforced
01Security architecture

Designs that connect controls to real outcomes.

02Hands-on labs

Build, break, troubleshoot, and understand.

03Technical storytelling

Clear explanations for engineers and leaders.

Secure Layer by Jon

Notes from the field.

My YouTube channel and field notes will share practical lessons from building, troubleshooting, and explaining modern security environments.

YOUTUBE CHANNELCOMING SOON
▶
SECURE LAYER BY JON

Build · Break · Fix

Secure Layer by Jon.

Hands-on Fortinet and network-security labs, practical troubleshooting, architecture tradeoffs, and the lessons that survive outside the slide deck.

FIELD NOTES01

Architecture & troubleshooting

The “why” behind the design.

Short, useful breakdowns of security concepts, configurations, and customer architecture decisions.

THE JOURNEY02

Learning in public

Road to NSE 8.

A candid record of the labs, gaps, breakthroughs, and systems behind pursuing Fortinet’s expert-level certification.

About

I like the part where
the diagram meets reality.

I’m a Fortinet Systems Engineer focused on networking and cybersecurity. My work lives between deep technical detail and the customer conversation: understanding the environment, finding the real problem, and making a solution understandable.

This site is my place to build in public—interactive projects, technical field notes, and Secure Layer by Jon videos grounded in what actually happens in the lab and in the field.

FortinetSecure Layer by JonNetwork securityArchitectureLabsTechnical enablement