CSI Tech has been providing IT Services for over 20 Years

Our Services

IT Help Desk

Our IT helpdesk services are built to offer expert assistance when you need it the most. Our team is prompt and proactive and offers trusted support for all IT-related issues.

Data Backup & Recovery

Our multi-tiered Backup & Disaster Recovery services offer a complete solution for unpredictable data loss events. With our comprehensive recovery planning, we assure you that you never lose any essential data so that your business never experiences any downtime.

Cloud Services

Our team can assist you to develop a strategy suitable for your organization. We’re ready to help you develop, design, deploy, and drive the right cloud solutions that align with your needs. From Microsoft 365 to Azure and Cloud Backup we have what you need.

Cyber Threat Monitoring

We believe that preparation and continuous monitoring are the best ways to maintain network security. We develop a plan tailor-made for your business.

Our History

Located in Crystal Lake, IL, originally Cornerstone Systems Inc., CSI Technical Services has been providing IT services since May of 2000.

Our Staff

Everyone at CSI has a passion for technology.  Our team consists of talent from various technology backgrounds supporting Local Government, Manufacturing, Finance, and other highly regulated environments.

Our Customers

Nearly all of our new customers have been earned through referral or reputation. Our customer retention is 99%. We do not employ a sales team, preferring to invest in talent, technology, and continuous improvement.