DRABSNARG.
ENGINEERING PORTFOLIO & TECHNICAL LAB

Engineering
systems.
Building software.
Exploring AI.

I’m CJ, a media systems engineer in Brooklyn. I keep a live broadcast plant on air: the networks, the Dante audio, the playout. Drabsnarg is where I write down what I build, what breaks, and what I learn.

Explore projects About me
REAL SYSTEMS. DOCUMENTED DECISIONS. ONGOING EXPERIMENTS.
DRABSNARG / SYSTEM ARCHITECTURECONCEPT · 01
Public portfoliodrabsnarg.com
PUBLIC
Independent services
PRIVATE AI ENVIRONMENT
Secure accessCloudflare Access + Tunnel
Open WebUIIndividual accounts · chat interface
Local inferencellama.cpp → Qwen
iMac Pro / 128 GB RAM / Owner-operated
Local inference testedRemote access planned
Systems engineeringBroadcast & mediaNetworkingSoftwareLocal AI
BUILT TO KEEP EVOLVING ↗
SYSTEM MAPS / THE SIGNAL PATH

Follow the signal.

Explore system maps ↗
Dante · plant migrationThe order of the remediation, without addressing or device names
  1. 01Audit: who is on which switch
  2. 02Dedicated subnet + static addressing
  3. 03DDM domains + dedicated PTP leader
  4. 04Cross-building pilot group
  5. 05Full plant cutover
Master control · staying on airSimplified playout path during a facility move
  1. 01Crispin automation
  2. 02Cloud playout: Harmonic VOS360
  3. 03Media via Azure, live via SRT
  4. 04Monitoring room watching air
  5. 05Back to on-prem XOS
Jarvis · release gateHow a change becomes a running release
  1. 01Claude Code builds + tests
  2. 02Codex independent audit
  3. 03Unqualified READY only
  4. 04Tag + staged deploy
  5. 05Real-machine go-live checks
01 /SELECTED WORK

From idea to implementation.

All projects
Completed
Broadcast & Media Systems

Dante audio network remediation

Taking a multi-facility Dante plant off link-local addressing and onto a dedicated subnet, managed domains, and a dedicated PTP leader.

DanteDante Domain ManagerPTPAddressing
PROJECT / 01
Completed
Broadcast & Media Systems

Moving master control without going off air

Planning a master control relocation and keeping the channel on air through cloud playout while the physical plant moved.

Harmonic VOSHarmonic XOSCrispinSRT
PROJECT / 02
Completed
Networks & Infrastructure

Building a cathedral broadcast network overnight

Designing and installing a new facility network for a cathedral broadcast site, then cutting it over in a single overnight window.

Meraki MX250Meraki MS355VLANs5G failover
PROJECT / 03

Employer names, addresses, and topology are left out of every write-up. Results appear only when documented.

02 /TECHNICAL DISCIPLINES

Connected by curiosity.

My work sits between disciplines. Understanding the connections is often where the most useful engineering happens.

01

Broadcast & media systems

Playout, Dante audio over IP, routing and sync, and Engineer in Charge for live events.

02

Networks & infrastructure

Nexus and Catalyst broadcast cores, Meraki site builds, multicast, and WAN failover.

03

Software & automation

Python and PowerShell tools for audits, migrations, and the work I got tired of doing by hand.

04

AI & local inference

Open-weight models, owner-operated hardware, inference experiments, and AI development tools.

05

Endpoints & cloud

Intune, Microsoft 365, SharePoint, and knowing which machines should never get a policy push.

06

Documentation & process

SOPs people actually use, vendor escalations with evidence, and one change at a time.

03 /THE DRABSNARG AI LAB

Local hardware.
Open models.
My own infrastructure.

An evolving environment for self-hosted AI, model experiments, and software development. Built around an iMac Pro, llama.cpp, and Open WebUI.

Explore the AI Lab Launch AI

AI APPLICATION: INVITATION-ONLY · AUTHENTICATION REQUIRED

Owner-operated inference128 GB iMac Pro · Qwen coding model
A deliberate access boundaryLocal stack tested. Secure remote access planned.
Experiments with contextDocument the configuration, method, and limitations.
04 /THE ENGINEERING NOTEBOOK

Notes from the workbench.

Browse knowledge
Oct 26, 2026Case study
Broadcast & Media Systems

Dante Virtual Soundcard: "No audio data"

DVS subscriptions failed on an edit suite. The cause wasn't Dante at all. Windows had moved the NIC to a Public profile.

Oct 26, 2026Case study
Automation & Tools

A release that failed on a dot

Jarvis v1.0.0 passed 900+ tests, then stopped in its own deployment rehearsal. The cause was a security check applied one place too many.

KEEP EXPLORING

There’s always another layer.

Browse the scripts and SOPs in the toolkit, or see what I’m working on right now.

Open the toolkit What I’m working toward