Our team of experts provides Security Solutions including Managed Next-Gen Firewall Services, Managed Vulnerability Management, Managed Email and End User Security, Data Loss Prevention and more.


Large Ideas Helping Local Business Gain piece of Mind

South Bend, Indiana-based QuantaSi is a managed security services provider helping businesses secure their data and proactively anticipate curveballs, all while protecting clients’ online presence and granting peace of mind.

Founded in 2016 by Nick Hahaj, with James Doty joining shortly after, QuantaSi specializes in Infrastructure, Hybrid Cloud, IT Support, and offers a comprehensive suite of Security Services to businesses of all sizes.

What began as a sole proprietorship serving two clients has grown into a multi-employee, local company with large ideas helping local people.

Our South Bend, Indiana, headquarters offers 24/7/365 system monitoring and speedy response times, ensuring personal, one-on-one communication with one of our technicians.

QuantaSi now counts more than 30 regional clients, including several nonprofits. Our goal: help businesses stay one step ahead of the ever-changing landscape of cyber threats, improve IT efficiency and plan for a path forward.

The best offense begins with QuantaSi in your corner.

What Our Clients Say

"QSI has been a great partner to our organization; very responsive in critical situations, takes the time to explain things in detail, and looks ahead and alerts us to potential down stream issues on projects and offers potential solutions for us to consider beforehand. Additionally, the team is personable and easy to work with."

-David S., Global Access Point

"QuantaSi has been a fantastic partner in working with our company (Steel Warehouse) in a very complex domain migration projects. Their staff was extremely knowledgeable and responsive and were able to pivot when we hit roadblocks along the way. Highly recommend!"

-Eliezer W., Steel Warehouse

"QuantaSi helped us through the complex design and implementation of our digital computing infrastructure. Their knowledge has helped scale our company while implementing the best cybersecurity principles. They are world-class experts and build technology to last."

-Nate M., CEO, Consensus Networks

"We recently worked with QuantaSi to perform an in-depth network audit/review and the results far exceeded expectations. The information they provided was highly detailed and will be very beneficial to us moving forward. Working with QuantaSi was a pleasurable experience, and I look forward to working with the team in the future."

-Ian H., Chase Plastics

"I recently opened an Accounting Firm and the guys did amazing making sure I was set up timely and efficiently. Highly recommend!"

-Angela R., Star Accounting

Meet Our Leaders

Nick Hahaj

A lifelong local resident, Nick began his IT career in 2001 on the service desk, and through hard work, training and dedication, progressed his way to managing teams of experienced system and network engineers. He has held numerous technical and managerial positions in a wide range of industries. He has designed, implemented and supported industry-standard technologies including those from Cisco, VMWare, Microsoft and EMC as well as implemented innovative solutions using commodity hardware. Nick has expertise in designing complex IT solutions, Project Management and Capacity/Business Continuity Planning. In addition to his hands-on experience and training, he holds or has held several Industry recognized certifications, including those from Cisco, CompTIA, Microsoft and ITIL.

Nick’s time in front of a screen is eschewed for sunlight, woods and trails, whenever possible. He’s an avid lover of outdoor activities with a refreshing disconnect, especially power sports such as dirt bikes and four-wheelers.

James Doty

James has been a resident of the Michiana area his entire life. He began his IT career in 2000 as a district technician and moved on to roles as a sys admin, voice engineer and ultimately an MSP engineer. He has held technical positions in several different organizations including school systems, local government and the private sector. He has deployed virtual environments, Cisco VoIP systems, Meraki and Cisco networks, as well as entire environments from the ground up. James has worked several projects simultaneously, from start to
finish, and met deadlines with proficiency and accuracy.

When James is not in front of a keyboard, he spends his time disconnecting from all electronic devices when possible. His cellphone would not be in ear shot. He enjoys being outside and would love to be close to or on a body of water somewhere with a lot of sunshine. He loves football, and you will find him spending maybe too much time during the fall months watching Michigan football and the Chicago Bears on Saturdays and Sundays. He enjoys spending his downtime with his family and friends and would be content sitting around a fire with good conversation, good music and something to throw on the grill.

Contact Us Today To Learn How We Can Help!

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