The Builder

Casey Reid

Field CTO, builder, hacker at heart.

Casey Reid is a Field CTO at Tenable who builds and automates security solutions with Python, turning complex challenges into scalable innovation. He created navi, the open-source CLI for Tenable Vulnerability Management — 353K+ PyPI installs, 98★ and 32 forks on GitHub. He writes on security automation, Python, leadership, and the philosophical foundations of technology and risk. The Hounds is an independent, open-source project — not affiliated with or endorsed by Tenable, Inc.

— Origin Stories

The Articles That Inspired the Hounds

Every hound started as a real problem I solved and wrote about. Read where each one came from.

LAELAPS — Tag Assets by CISA Known Exploits

Automatically tag assets based on CISA's Known Exploited Vulnerabilities catalog.

ORTHRUS — Tag Assets by MITRE ATT&CK Impact

Map Tenable.io assets to MITRE ATT&CK impact categories for risk-aligned tagging.

CHARON — Security End of Life: Where Am I Exposed?

Identify assets running software past its security end-of-life date.

ANUBIS — Change Asset Criticality (ACR) by Tag

Programmatically adjust ACR scores in Tenable.io using tag-based rules.

SIRIUS — Tagging Agents by Agent Group

Tag Tenable.io assets by their agent group membership for better segmentation.

PYTHIA — Where Am I Using AI?

Discover and inventory AI tool usage across your environment.

JANUS — You're Fired! Now Where Do You Have Local Accounts?

Hunt for stale local accounts left behind after employee offboarding.

MIMIR — Building a Software Inventory with Nessus

Use Nessus scan data to build a complete software inventory across your fleet.

CAVALL — My Guilty Obsession: Tagging by Plugin Output

Extract signal from raw plugin output to drive precision custom-application naming and asset tagging.

CHRONOS — For the Love of 19506

Why plugin 19506 is the most important scan result you're probably ignoring.

COVENANT — Automate Everything with Navi 8.2.1

How navi 8.2.1 unlocked far more scalable exposure management automation.

THE PACK — The Navi MCP: 17 Skills Driving Accurate Exposure Management Automation

The MCP server that gives AI agents direct, grounded access to your exposure data — 20 tools, 17 skills, double-gated writes.