Marc Cronin

AI Agentic Systems Digital Marketing Mechanical Engineering

Founder of GCodeTutor. Co-founder of Insight Division Labs.

Avid snowboarder and guitarist.
Building the future of AI marketing from wherever there’s good wifi.

/ The story

The short version

I studied mechanical engineering - the kind of training where you learn to think in systems, tolerances, and physics. When I pivoted into digital marketing and SEO, I brought that same engineering mindset: understand every variable, test everything, build for the long term.

In 2017, I built GCodeTutor from a laptop on a beach in Thailand. No office, no team, no investors - just deep knowledge of CNC machining and a willingness to teach it well. The business grew. It funded eight years of travel across Asia - snowboarding in Bulgaria, island-hopping around Thailand, coding from coworking spaces in Chiang Mai and Koh Lanta, chilling in Hoi An. I've made my home in Nepal, Bali, Cambodia, Hong Kong. And I still run GCodeTutor.

Now I’m co-founder of Insight Division Labs, where I build AI agentic systems for marketing. It’s the same thread running through everything: I figure out complex systems, then build tools that do the heavy lifting. Engineering meets AI meets education.

/ What I build

Three disciplines, one brain

I don’t fit in one box. The combination is the point.

AI Agentic Systems

Designing autonomous AI workflows that do real marketing work - not just chatbots, but multi-agent systems that research, write, optimise, and execute. Built with Hermes Agent swarms and a growing stack of agentic tools.

Digital Marketing

SEO, social media, email campaigns, and content strategy. I’ve ranked businesses in competitive markets and built audience engines that grow on their own. I know what makes people click, read, and buy.

Mechanical Engineering

GCodeTutor wasn’t a marketing play - it came from genuine deep knowledge of CNC machining, G-code, and how physical systems work. That engineering mindset carries into everything I build: precise, testable, and built to last.

Marc working from a laptop setup by a lake in Nepal.

Marc with an engineering and systems mindset.

/ Projects

What I’m building

founded 2017

GCodeTutor

The go-to resource for learning CNC programming online. Built solo from a beach in Thailand, it grew into a sustainable business that funded eight years of travel across Asia. CNC machining courses that actually teach you G-code.

Visit GCodeTutor →

co-founded 2025

Insight Division Labs

AI agent education. We teach people how to build real, working AI agent systems - Hermes, Claude Code, automation pipelines, home AI. No hype, no theory. Just practical engineering that makes businesses faster and smarter.

Visit Insight Division →

/ The rest of it

I don’t live in a terminal

I used to be a semi-professional guitarist - played gigs, wrote music, spent years obsessed with tone and timing. There’s a direct line from learning to play in a band to building complex systems: both require listening, improvisation, and knowing when not to play.

When I’m not building AI systems, I’m usually on a snowboard somewhere with decent powder, or staring at the ocean from a coworking space with suspiciously good wifi. Mechanical engineer by training, digital builder by trade, traveller by nature.

🎸 Guitar 🏂 Snowboard 🌊 Beach life 🤖 AI builder