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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 Tutorials

Why 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 networks

No 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 thousands

Problems 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 2002

My 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.

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

1.9M

Tutorial Views

10K+

Businesses Learning

200+

Free Tutorials

23

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.

Got Questions?

Find quick answers to common IT support questions

How quickly can you respond to IT issues?

While many companies claim a 15-minute response, we guarantee a one-hour response time for urgent issues. This realistic timeframe allows our expert team to mobilise properly and arrive fully prepared to diagnose and resolve the problem efficiently - ensuring quality support rather than a rushed service.

How long has Sheridan Computers been established?

We've proudly been established for over 15 years. Our enduring presence in the IT industry is a testament to our commitment to quality, innovation, and reliable service. We’re here for the long haul, continuously evolving to meet the needs of our customers today - and in the future.

IT Emergency?

24/7 emergency IT support available for existing clients

Help & Support
Standard Support Hours

Monday - Friday 8:00 - 17:00
Saturday Closed
Sunday Closed
Other Ways to Reach Us
24/7 Emergency Support

Critical issues? Our emergency team is available 24/7 for existing clients.

Emergency Support Line