"Success is walking from failure to failure with no loss of

enthusiasm." -- Winston Churchill

Who we are

What makes us different?

Coherence Systems was founded with one intention: To provide the highest quality, no nonsense service to our clients. We’re not here to sell you products or lock you into blocks of monthly hours. We’re here to solve your problems, and make you grow. Coherence Systems was founded by Andrew Walsh and Lloyd Kalicki. Both have been in the consulting field for two decades in addition to working in data centers. They both bring vast skill sets to the table, and together make a wonderful team. When you deal with Coherence Systems, you aren’t getting a consultant, you’re getting a partner. We strongly feel that the relationship with the client is of the utmost importance, It is our goal to see you succeed. We have 40 years of experience building companies up and solving their most difficult needs. We would like to continue our track record of success with you.


What we do

With over 40 years of experience there are few things we can't tackle

24/7 Responsive

We are here night and day, 7 days a week,

365 days a year. If your systems are down or you need off hour downtimes,

we will be there. It's never too late, or too early to call

System Architecture

Networks and heterogeneous

environments are our passion. We love designing and building the perfect IT solution for you. We think outside the box and make just about anything work.


From HIPAA and PCI compliance audits, to

pen testing and actual network attacks, we have the ability to get your network security in line with complete reporting and monitoring tools. We run elaborate Phishing campaigns against your employees to ensure they they aren't clicking on those emails.

Maintenance and CIO

Let Coherence Systems manage your I.T. infrastructure, you can rest assured that we will be monitoring your network 24/7 and running proactive tests and system diagnostics throughout the week. We don't wait for errors to pop up, we look for them

before they happen. Let us take the burden of managing I.T. off of you with dedicated staff who will be on-site as much as needed..

The Cloud

Computing is changing so rapidly that if you're not staying up on cutting edge tech, you'll be left in the dust. Allow us to move your resources to the cloud and lose the burden of depreciating server hardware.

Our Expertise

We are Exchange and Active Directory Gods! Let us build you robust virtualization systems. Need high speed storage? You've come to the right place. We will use our expertise of various systems to move you into the future.

How we work

We try to quote out all of our projects, there are no surprise bills with us.

1. We will come in and evaluate your needs
2. We'll present our recommendations and project plan.
3. We get to work around your time line. We work day and night to get jobs done.
4. Project Complete!

Our great Team

The guys who make it all happen


Andrew Walsh

CEO & Director

Lloyd Kalicki


our client says!


"Coherence Systems provides top notch problem solving skills, when everyone else has given up, they come in and solve our problems."

"Coherence Systems comes in and gets the job done, they work fast and hard."

"Coherence Systems has saved the day for us many times, I can't recommend them enough."

Andres Yuhnke

Amy Tucker


Brian Calhoun


J. Henry Stuhr INC

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Get in touch

Please contact us for any inquires.


111 W. 6th st #1207 Tempe, AZ 85281

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