Meet Sheridan Computers
When your IT provider writes the security software protecting thousands of businesses worldwide, you know you're in safe hands
Work With an Expert Learn From My TutorialsWhy Your Business Deserves Better IT Support
Most IT companies just sell you solutions. I help build them. As a core contributor to OPNsense, I don't just implement security - I write the code that protects thousands of businesses worldwide.
When you need OPNsense, who better than literally the most qualified person in the UK to deliver it?
Your Firewall Problems, Solved
When your firewall breaks at 3am, you need someone who can fix it - not read a manual. I wrote the OPNsense snapshot feature that saves businesses from failed updates. Your network security isn't just installed; it's engineered by someone who builds the tools.
Helping 11,000+ businesses secure their networksNo Vendor Lock-In
While others keep you dependent, I teach you to fish. Free tutorials mean you can solve problems yourself at 2am, or call me when you need expert help. You're empowered, not trapped.
200+ tutorials saving businesses thousandsProblems Solved Before They Happen
23 years means I've seen your problem before. That "weird" issue keeping you up? Fixed it in 2015. That ransomware threat? Blocked it last Tuesday. Experience means faster fixes and prevented disasters.
Preventing disasters since 2002My Philosophy: We're Either the Right Fit or We're Not
Security is a Team Sport
When one client faces a threat, we all learn from it. This collective intelligence approach means every business I protect benefits from the security insights of all others. But this only works when everyone is fully protected - no weak links.
Protected Like My Own Business
This isn't just about using the same tools - I protect every client's business as if it were my own. Industry "best practices"? That's a low bar. My standards are much higher because your business deserves better.
Fair Warning
I don't compete on price by cutting corners. If you're looking for the cheapest option, I'm not it. If you want IT support from someone who literally writes the security software protecting thousands of businesses, let's talk.
Deep Technical Expertise That Benefits Your Business
Open Source Contributions
- OPNsense Core: Boot Environments (Snapshots) feature - recover from failed updates instantly
- OPNsense Plugins: Tailscale integration - modern VPN solutions for your team
- This Website You're Reading: Built with Mezzio - a framework I contribute to. When you hire me, you get someone who writes the tools, not just uses them
What I Teach (For Free)
- 70+ Firewall Tutorials: Save £5k+ on commercial firewalls
- 8+ Asterisk/VoIP Guides: Build phone systems, not buy them
- 23+ UniFi Tutorials: Enterprise WiFi without enterprise costs
- 16+ Virtualisation Videos: Proxmox & XCP-ng mastery
- 8+ TrueNAS Guides: Enterprise storage on a budget
Don't Just Take My Word For It
Watch me solve the exact problems you're facing - for free
Tutorial Views
Businesses Learning
Free Tutorials
Years Experience
Why pay thousands for proprietary systems when you can learn to build them yourself? Or let me build them for you at a fraction of the cost.
Ready for IT Support from Someone Who Actually Knows What They're Doing?
Stop settling for generic IT support. Work with an expert who contributes to the tools protecting your business.