Southern Wisconsin’s Locally Owned, Award-Winning IT Partner Since 1997
For three decades, we've helped small and medium-sized businesses leverage technology with expert IT consulting, cybersecurity, cloud, and managed services.
Proudly serving Madison and communities throughout southern Wisconsin.
Proactive Technology Solutions
Managed Services
Proactively identify network and hardware issues before they cause serious damage.
Cybersecurity
Protect your network from cyber threats to ensure your network is as secure as possible.
Microsoft 365
AI built into Microsoft 365 Copilot helps you collaborate and work more efficiently.
Why Choose Adesys?
Our team of experts is dedicated to helping businesses improve their operations through the use of technology with:
Comprehensive IT Solutions
Award-Winning Excellence
Proactive IT Management
Robust Security Measures
Responsive Support
Scalable Solutions
Client Quotes
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![Physicians-for-Women-logo]()
"As a group of busy, private physicians, we have relied heavily on the expertise of Adesys to meet our IT needs. Their entire staff has been professional, efficient, and readily available. Utilizing their help in managing our network requirements, they also assisted us in maintaining costs, which demonstrates our trust and faith in their knowledge and position in the IT community."
Julie A. Schurr, MD | Physicians for Women
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![Logo for Tingalls Graphic Design with colorful abstract shapes in the background.]()
"Adesys is the superhero of the IT world. They're incredibly quick to respond, budget-friendly, and highly professional. They can demystify and navigate rapidly changing technology trends, which has been a game-changer for my clients and me."
-Tara Ingalls | Owner - Tingalls Graphic Design, LLC
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![Logo for Oak Bank featuring stylized text in dark green over a beige background with an oak leaf illustration.]()
"Adesys has been our information technology consultant since 2003. They have never failed to deliver the high level of service that we demand. They are very responsive when called upon and their level of competence gives us confidence in our systems security. Our reliance on a business like Adesys is strategic in scope. They have always met our high expectations."
Bob Gorsuch | Chairman & CEO - Oak Bank
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![JT Engineering]()
"Adesys has been a strong partner in supporting our IT infrastructure and day-to-day operations. They are proactive, responsive, and deeply involved, from security and monitoring to equipment setup and user support. Their ability to operate as an extension of our team allows us to stay focused on our business while knowing our systems are in good hands."
Doug Sina | President/CEO - JT Engineering
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![Logo for Quality Cellular with stylized blue swoosh]()
"Adesys has been our exclusive IT vendor since 1998. Adesys has always provided excellent service and advice - we view them as trusted advisors. They have helped us grow from one retail location in Verona, Wisconsin to sixteen retail locations and one distribution facility. Adesys has implemented computer and network systems that are cost effective and flexible."
Dave Rancourt | President - Quality Cellular
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![Graphic with the text "SW&D" in bold, white 3D letters on a gray background.]()
"The Adesys team is enthusiastic and committed to making sure we are their priority. We consider them part of our family, both corporate and personally. We are grateful that Adesys is by our side as we continue our business in the future."
Dianne & Dick Sharratt | Sharratt Warehousing & Distribution
