100% US-Based Since 1997
For over 27 years, Tierzero has been the trusted partner for businesses needing reliable internet, voice, and managed network services.
Our Company History
Founded in 1997, Tierzero began as a startup struggling with slow and unreliable internet. This experience fueled our mission to become a different kind of ISP, offering businesses exceptional service and taking full responsibility for their connections. Over 27 years, we've grown from basic internet to comprehensive communication and IT solutions, but our core value remains unchanged: "We keep you connected" - it's not just a slogan, it's who we are.
Read More
Tierzero began in 1997 as an "Internet" startup developing a business plan to launch an online game. One of our first tasks in setting up our office was establishing a high speed internet connection. Back then "high speed" Internet was delivered over copper lines built on a 1960's protocol called a T1. The only way to get a line was to lease one from the phone company that connected the office to an Internet Service Provider where the Internet could be accessed.
Business high speed Internet was new and there was little in the way of standardized processes and best practices. The challenge was equipment needed to be configured at the office, the telephone company and the ISP so they all talked to each other. What often happened was each of the parties insisted on their way of doing things and pointed the finger at the others.
After doing some research we decided to launch our own ISP dedicated to providing high speed Internet access to businesses. Our competitive edge was designing a network that we could completely control allowing us to take full accountability for the service to our customers. We eliminated all finger pointing, reduced the installation time by months, lowered the price in half, and proactively monitored the lines so we could catch problems before they happened.
Fast forward to 2023, as we celebrated 25 years in business, we decommissioned our last T1 internet service. An end of an era but as the preceding years and decades marched on we expanded into connecting multi-site businesses, 10 gigabit fiber optic Internet access, fixed wireless, VoIP telephone systems, cyber security and managed IT services. But the core value that the company was built on, the reason why customers have stayed for decades, is that we take full responsibility for the service we provide and don't make excuses. "We keep you connected" is not a slogan or tagline. It's our legacy and the bedrock of every customer interaction.
Our Team
We believe it's our job to make the lives of business owners and IT managers less complicated and deliver an elegant solution that works with the least amount of hassle.

John Carter
Founder and CEO
27 Years at Tierzero

Mike Gach
VP of Sales
19 Years at Tierzero
Hans Offer
VP of Operations
11 Years at Tierzero

Susan Chung
VP of Finance
5 Years at Tierzero

Mark Whitener
VP of Business Development
New at Tierzero
Rathany Suon
Technical Support Specialist
8 Years at Tierzero
Jesus Salas
Network Engineer
5 Years at Tierzero

Nick Pierce
Systems Architect
10 Years at Tierzero

Humberto Oregon
Technical Support Specialist
New at Tierzero

Glenn Garcia
Technical Support Specialist
New at Tierzero

Nick Mann
Accountant
New at Tierzero
Top 10 Reasons
No Hassle Promise
At Tierzero we focus on one goal – delivering no hassle voice and data to Southern California businesses. We insist on making sure every single client is not just satisfied, but happy. Your expectations are our responsibility.
Tierzero has grown and prospered mostly by word of mouth. Our customers don't recommend us for empty slogans or mission statements. They do so because they know the power of having a vendor that's got their back.
We welcome you to experience our no hassle promise.


"I'm passionate about exceeding customer expectations for internet and phone service."
"I always try to put myself in the shoes of our customers when solving their problems."

"We believe our customers shouldn't have to worry about their service. We know our customers count on us and we're accountable for that."
What's Challenging Your Business?
Whether it's navigating new projects, overcoming technical hurdles, or finding the right resources, we want to hear about it. Let's find a solution together.





