IT Services

Since 2004, Ontech Systems has provided small to medium sized businesses in Southeast Wisconsin with responsive, reliable IT Support.

Mark Dohnal- President, Mike Piotrowski – Owner

Managed and Hourly IT support

98% Client Retention Rate Since 2004

Our dedicated client teams specialize in consulting skills, the ability to relate to the various scenarios that effect a business. Our focus on communication, response times, and proactiveness allow our clients to effectively plan and budget as IT continues to play a larger role in day to day business needs.

With a 98% client retention rate over the past 10 years and no long term contracts; our clients stay with us because they want to, not because they have to. Ontech’s IT services range from managed IT services, disaster recovery and VoIP to virtualization, server maintenance implementation and more.

The service model at Ontech provides clients a multitude of options that can fit their various needs.  Our account team is able to provide our clients a local dedicated account manager responsible for overall services to the account.

On the technical side, our teams practice industry standards and maintain consistent, up to date certifications from industry leading technical partners.

We look forward to the opportunity to build a long lasting partnership with you.

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

Small business IT support services

Are Security Risks Lurking in Your Network?

We will identify potential vulnerabilities in your network. No obligation. No cost to you.

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Free Network Discovery


During your FREE Network Discovery, we will identify high risk vulnerabilities in your network and make recommendations to strengthen the security of your network – from data backup, to firewalls, server security and more.

No obligation. No commitment. Put us to the test!

Thank you for requesting a free Network Discovery from Ontech Systems. Your request has been received and one of our staff members will get back to you soon to schedule our assessment of your current network.