IT Services in Green Bay

Serving Greater Milwaukee & Fox Valley Businesses

Ontech Systems, Inc. is a Milwaukee-based IT services provider supporting small and mid-sized businesses across Eastern Wisconsin. Since 2004, we’ve delivered reliable, secure, and personalized IT solutions that help our clients grow with confidence.

Let’s solve your IT challenges—together.

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Years in Business

Client Retention Rate

Vendor Relationships

Ontech Systems office in Milwaukee - Managed IT Services Serving Fox Valley

Local, Trusted IT Partner for Green Bay SMBs

Originally founded in Menomonee Falls and now based in Milwaukee, Ontech supports small and mid-sized businesses across Eastern Wisconsin—from Greater Milwaukee to the Fox Valley – Green Bay, Appleton, Oshkosh, Neenah and beyond.

From Network Projects, Managed IT Services to hourly IT support and Hardware Licensing, our local, dedicated account teams take the time to understand your business and build solutions around your goals. We value strong, long-term partnerships—and with a 98% client retention rate, it’s clear our clients value them too.

Here’s What Our Clients Have to Say!

Accounting firm Milwaukee

Security is a priority, and timely responses to issues.

Tom T.

Manufacturer WI

Flexible service model
Very responsive
Excellent technical support
Broad range of services

Bob W.

Non Profit WI

Easy to get a hold of, helpful, and quick to fix whatever is broken. They have taken our needs and budget into consideration planning for the future.

Super happy with our partnership with Ontech.

Sara J

Advisory Services, WI

Ontech treats every customer big and small like they are their most important priority. They provide real, sound advice and counsel on the best way to make IT work for our organization, goals, and priorities. Not only can we count on them today, we know they can grow with us in the years ahead.

Christian T

Health Company in WI

I like the affordability for monthly services for small business’ needs. Ontech is very responsive even for small accounts like us when needed. Other IT companies in the past tried to charge what we didn’t need and took a long time responding when we needed help (probably because we are not a huge revenue account for them), but Ontech has not disappointed me and my staff for the past 5+ years.

Michelle K.

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!

What Sets Us Apart

At Ontech, we strive to provide our clients with clear communication, accommodating support, and a proactive approach. And unlike other companies, we don’t lock you into long-term contracts—if you’re not satisfied, just let us know!

As a small business, you juggle more responsibilities than larger companies. We understand! When technology fails, it’s often outside your expertise. That’s why, alongside IT support, we offer consulting to help you plan and implement the right solutions.