About Ontech Systems

Founded in 2004 and located in Menomonee Falls, Ontech Systems provides comprehensive technical solutions for small and medium-sized businesses throughout Greater Milwaukee.
Free Network Discovery

Years in Business


Client Retention Rate

Vendor Relationships

Mark Dohnal – President, Mike Piotrowski – Owner

Is Your IT Infrastructure Working With…or Against You?

To offer the most functional, reliable, and cost effective solutions for today’s businesses, we have partnered with industry leaders to provide our clients the most up to date solutions on the market.

Since 2004, we have achieved a 98% client retention rate – one of the highest retention rates in our industry. Ontech provides IT support and consulting to all of the Greater Milwaukee area.

Four Primary Service Areas

Our dedicated Account Teams will design a plan to help your business achieve your upcoming IT goals.

Network Related Projects

Server and SAN Setup & Migrations, Infrastructure Upgrades, Azure & Office 365 Migrations, Network Security Assessments, VoIP On premise and Hosted Solutions, etc.

Managed Services

Proactive IT Support allows our service team to proactively monitor, manage, and troubleshoot, 24×7, across your network devices users. Servers, Infrastructure, PC’s, MAC’s, Mobile Devices and User Help Desk are available.

Hourly IT Support

Proactive onsite or remote support with 1 of our local technicians. Can also be combined with Managed Services to create a hybrid IT support model that best fits your needs and budget.

Hardware & Licensing Sales

Purchasing, License Management, Asset Management.
Don’t Settle For Sub-Par IT Support 
At Ontech Systems, we pride ourselves on offering 4 things that separate us from the competition:

  • Communication Skills – We speak a language you can understand and our techs are very accommodating towards staff.
  • Response Time – You’ll get a phone call/email within an hour during normal business hours.
  • Pro-active approach – we’re not a break/fix firm. We take into consideration your company’s growth outlook as well.
  • No Long Term Contract – We don’t lock our clients into long-term contracts. If you’re not happy with our services, simply let us know.

As a small business, you are in a unique position that requires you to juggle more responsibilities than larger companies.  When technology fails, you are often faced with difficult decisions outside your area of expertise. That’s why in addition to our IT support services, we take the guess work out of planning and implementing solutions through small business IT consulting.

Our IT support and services have been rated 5 / 5 based on 10 testimonials from our clients.

Management/Leadership Team


President and Partner


Office Manager


Technical Service Manager


Cloud Services and RMM Manager


Founder and Partner
Ontech News & special promotions
Ontech is Celebrating 15 Years of Service!

Ontech is Celebrating 15 Years of Service!

Ontech Systems is celebrating 15 years of providing IT support and servicing small to medium sized businesses in Southeast Wisconsin this March! A special thank you to all of our clients and vendors who have supported us along the way! The relationships and trust we...

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Why Conduct a Network Risk Assessment?

Why Conduct a Network Risk Assessment?

Is a network risk assessment really necessary? Without a doubt, 2020 has been an unprecedented year. With pandemics, lock-downs, a planned recession and enormous amount of uncertainty, many things have changed but cyber threats remain the same. Hackers and cyber...

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How to Change IT Providers

How to Change IT Providers

When considering how to change IT providers, the choice is one of the most consequential decisions you will make for your business. Get it right and you can sit back and relax, knowing your IT operations are in the best possible hands. Get it wrong, and you could...

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Ontech Appearances on Fox 6 News

Fox 6 News sat down with Ontech’s own Jared Olson to get an IT perspective on a cyber-attack targeted at Milwaukee’s own Bradley Foundation.  Watch the full story below or check out the news release online.
On a separate occasion, Fox 6 News turned to Ontech’s senior consultant John May for security expertise on another story regarding email security.