About Ontech Systems

Ontech Systems, Inc., originally founded in Menomonee Falls in 2004, has excitedly transitioned to our new location in Milwaukee, where we continue to provide comprehensive technical solutions for small and medium-sized businesses throughout the area.

We encourage you to request a complementary Network Discovery where our professional technicians will identify high risk vulnerabilities within your business and make recommendations to strengthen the security of your network.


Design Specialties, Inc

“Ontech has been our single source for network and server support, IT budgeting, and project planning for nearly 10 years. Ontech’s consultants are attentive to our needs, communicative, and always available when we need them. They make us feel like we are their only account, which is wonderful!”


The Bridge Health Clinics & Research Centers, Inc.

The most responsive, knowledgeable, and efficient IT systems company we have worked with.  Ontech set our clinics up with a great system for moving forward with the ever changing healthcare environment and have given excellent support for every aspect of our IT platform.

Thank you Ontech!!


Vanden Huevel & Dineen

Thank you Ontech!!If you need effective and prompt network and computer based services, the answer to your needs is Ontech Systems. No matter how big or small the problem, a call to Ontech means that help is on the way! Costs are reasonable. Technicians are friendly. Problems solved!

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 Eastern Wisconsin.

Four Primary Service Areas

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

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.

Management / Leadership Team


President and Partner


Office Manager


Technical Service Manager


Cloud Services and RMM Manager


Founder and Partner

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.

Fox 6 News turned to Ontech’s senior consultant John May for security expertise on another story regarding email security along with a variety of other newsworthy IT news.

Ready to Talk?

Contact us today to get started.