ABOUT
Thirty years of fixing things.
Seventeen of doing it for a living.
I’m Mark Johnson. I’ve been doing IT support for about thirty years, and running Green Link Tech since 2009.
It started because I kept breaking my own computers. After the third repair bill, my wife suggested that maybe I should learn to do this myself so we could stop paying someone else. She was right, and it turned into a career.

From break-fix to something steadier
Green Link Tech started life as PC Network Consultant, working mostly on home computers — one problem at a time, one call at a time. That work taught me a lot, but it isn’t a way to actually help anyone. You show up after something has already gone wrong.
Moving to business clients changed that. When you manage an environment instead of visiting it, you can stop problems before they cost someone their morning. That shift is where the Green Link Tech name came from, and it’s still how we work.
Who we are now
There are four of us — three full-time and one part-time. We’ve never had a sales team. Every client we have came from someone else recommending us, which is slower than advertising and works considerably better.
Today we look after fifty-two companies and around 250 machines. We’re based in San Antonio and work with businesses here and in Round Rock, and we support locations in Florida, Louisiana, and Arizona—mostly self-storage operators who brought us in through their management companies and then kept us as they added properties.
Some of our clients have been with us since the beginning.
Why we still like it
Honestly, the challenge. IT support is different every day, and the puzzle never gets old. We joke about saving the world one PC at a time, and there’s something to it—for the businesses we look after, technology working properly is the difference between a good week and a bad one.
That’s the whole job.
Preparation over reaction.
Effective IT isn’t about reacting fast—it’s about not having to. Every environment we manage runs on documented standards and consistent configuration, so problems get caught before they become outages. That’s what lets us promise response times we can actually keep.
Built for businesses that depend on their systems.
We work with small and midsize organizations across San Antonio, Round Rock, and beyond—from two-device offices to multi-site operations with eighty or more endpoints. A meaningful share of our clients run self-storage portfolios across Texas, Florida, Louisiana, and Arizona. Different industries, same requirement: technology that works the same way every time, without someone standing over it.
We’re upfront about fit.
Good fit
- You want fewer surprises, not just fast fixes
- You’re open to proactive maintenance and security standards
- You want a long-term partner, not a vendor
Not a fit
- You only want break/fix support on demand
- Price is the only thing that matters, regardless of risk
Like how we work? Let’s talk about your situation.
You’ve read a bit about us — now tell us what’s going on with your IT, and we’ll figure out if we’re the right fit.