I've spent 20+ years building and securing network, cloud and security infrastructure for global enterprises.
Now, I'm teaching everything I've learned.
Helping engineers break into cybersecurity, network engineering and cloud through hands-on courses, guides and videos, with 26,500+ already learning on YouTube.
Two channels. One at the desk, one far away from it.
Tech with Gerard
Hands-on videos on cybersecurity, cloud, networking and homelabs, for anyone who'd rather build it than read about it.
Everything on the channel follows one idea: build to learn. I set up real labs, break them, fix them, and show every step, so you can follow along at home. Most viewers are IT pros, developers and people working towards their next certification or their first job in tech.
What viewers are saying.
Straight from the comments on Building the Ultimate Cybersecurity Lab, with 162K views and 4.8K likes.
"I have learned more in this one video than I have in just about every other video on this topic combined. Very impressive and thank you for putting all this together."
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"This is amazing… The best tutorial/walkthrough out there."
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"I've worked for 2 years in a SOC… super excited about this series. I'll be sharing these with my coworkers for sure!"
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"A really good no nonsense tutorial. Every single step well explained and demonstrated… Thank you for your time and effort making this fantastic tutorial."
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"I love this, to the point and easy to understand. It took me 2 days to figure out how to get the firewall connected on other tutorials!"
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"As a pentesting student that also wants to be knowledgeable about the blue team side, this lab video is the best I've ever seen."
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Away from the desk.
My second channel, Gerard O'Brien, is where the laptop gets closed. Big trips, daft challenges, and the slow, messy job of turning an old van into a home on wheels.
Trips worth the jet lag
From the Khumbu valley to the temples of Japan, I film the places I go and the stories behind them, not just the highlights.
Rules, budgets and dice rolls
Tight budgets, random destinations and odd rules. Challenge videos around Ireland and abroad that rarely go to plan.
An ex-BT Fiat Ducato
I'm converting an old BT van into a campervan myself: off-grid electrics with 520W of solar and around 3.8kWh of battery, water, plumbing and a full fit-out.
Tell me what you've got in mind.
Brand partnerships, speaking, collaborations, or something else entirely. I read every message myself. Brands: product, goals and timeline are the big three.