Get reliable St. Louis IT solutions with 98.68% Customer Satisfaction rating
Reduce downtime with quick IT services; average issue resolution in 29.5 minutes.
Lower IT costs with efficient managed services tailored to your budget.
Simplify IT complexities with expert IT solutions aligned to business goals.
Resolve issues rapidly with our 24/7 support, ensuring minimal disruption.
Access certified IT staff through our managed IT services without in-house hiring.
With more than 28 years of experience, OCCSI is one of St. Louis’ most reliable IT firms, providing fast and dependable services to over 100 companies. Our expert team offers 24/7 support, ensuring your business stays secure and productive.
Ensure system stability with 24/7 monitoring and real-time alerts. We handle patching and troubleshooting to prevent issues and keep your business running smoothly.
Protect your business with layered defenses including Zero Trust, endpoint protection, and threat detection. We stop attacks before they impact your systems and data.
Access a vCIO who aligns IT with your business goals. From growth planning to cloud shifts, we help you make informed decisions that drive success and reduce risk.
Reduce IT hassles with our proactive 24/7 monitoring and management, ensuring maximum productivity and efficiency.
Leverage our IT consulting to align your technology with business goals, offering strategic support via dedicated vCIOs.
Resolve IT issues swiftly with helpdesk support, ensuring an average resolution time of 29.5 minutes to boost efficiency.
Ensure seamless operations with 24/7 network monitoring and rapid issue resolution that keeps your systems stable and your teams productive.
Optimize your cloud environment with seamless migration assistance and hybrid integration for maximum efficiency.
Protect your business with comprehensive cybersecurity solutions, including intrusion detection and prevention, tailored to your needs.
Transform your business with our expert-guided digital transformation services, supported by 28 years of industry experience.
Ensure uninterrupted operations with a rapid client onboarding process that typically completes within 14 days.
Safeguard your vital data with cost-effective on and off-site backups, ensuring rapid recovery and business resilience.
Managing IT doesn’t have to mean juggling vendors, chasing down updates, or reacting to every fire drill. At OCCSI, we take full ownership of your IT environment—from core infrastructure and network health to daily end-user support—so you don’t have to.
We handle everything: secure data backups, proactive monitoring, system patching, vendor management, hardware upgrades, software rollouts, and routine maintenance. Our team becomes an extension of yours, ensuring nothing slips through the cracks and every piece of your environment works together as it should.
No more tool sprawl. No more guesswork. No more fragmented support. With one point of contact, predictable service, and full visibility, you gain a stable foundation for innovation, efficiency, and growth.
Learn how our 24/7 support model keeps your systems stable and staff productive.
Lisa Paden relies on Onsite Computer Consulting Services, Inc. for both her business and personal technology needs. We provide knowledgeable, reliable, and proactive IT support that keeps systems running smoothly, allowing her to focus on her business and day-to-day activities without disruption.
Dr. Mark Sueoka, DDS needed IT support that was both reliable and cost-effective. At Onsite Computer Consulting Services, Inc., we provide responsive, knowledgeable IT solutions that resolve problems quickly, helping the practice operate smoothly without breaking the bank.
Foundational Pharmacy Strategies partnered with Onsite Computer Consulting Services, Inc. to keep their IT systems reliable, secure, and efficient. Through responsive support and expert guidance, we helped them focus on their core business without disruptions, ensuring their operations run smoothly.
Elite Tool needed IT support that could respond instantly to problems and adapt to their unique workflows, without forcing generic, one-size-fits-all solutions. Onsite Computer Consulting Services, Inc. (OCCSI) provided hands-on, onsite support, delivering tailored solutions that kept operations efficient, minimized downtime, and ensured the company only paid for what it truly needed.
Sheldon Dental Group needed an IT partner who could handle everything, from routine updates to major issues, without missing a beat. Onsite Computer Consulting Services, Inc. (OCCSI) stepped in, keeping systems up-to-date, solving problems quickly, and ensuring the practice runs like clockwork.
The Hills Dental needed more than just tech support, they needed someone who gets how a dental practice works. Onsite Computer Consulting Services, Inc. (OCCSI) jumped in with hands-on help, deep knowledge of dental software, and support they could rely on, day or night.
You get a full team managing your IT day-to-day—handling updates, monitoring systems 24/7, fixing issues fast, and helping you plan ahead. We take care of the technical work so you don’t have to think about it. Our St. Louis clients often tell us they value having someone local who knows their setup, shows up when needed, and helps prevent problems instead of just reacting to them.
We handle it all in-house. That includes firewalls, endpoint protection, patching, spam filters, and real-time monitoring. If we see something suspicious, we take action immediately. Some of our clients came to us after getting hit with ransomware or phishing scams. Now, they rely on us to lock things down and stay ahead of threats—no extra vendors or outside tools needed.
When something breaks, you won’t be left waiting. With our managed IT services, a technician begins working on your issue within 15 minutes of your call. Whether it’s a system crash, login issue, or network problem, we act fast to keep your business moving. You get quick, reliable support from a local team that understands your environment and treats every request with urgency.
Yes, they can. Our managed IT services include support for HIPAA, PCI-DSS, and other compliance standards. We help you put the right security tools in place, document your IT policies, and stay audit-ready year-round. Whether you’re starting from scratch or recovering from a failed audit, we guide you through the process so you’re not handling compliance alone.
We keep your network running with 24/7 monitoring, proactive maintenance, and real-time alerts. Our managed IT services cover patching, updates, and hardware checks to catch problems early—before they cause downtime. We also help you plan for growth with infrastructure assessments and redundancy strategies that support stability as your business scales.
Resolve technical issues faster with in-person support that eliminates back-and-forth and gets you back to work.
Deploy new hardware and systems seamlessly with installation tailored to your unique environment.
Optimize your physical network setup with onsite evaluations that improve speed, coverage, and reliability.
Prevent future disruptions with routine assessments that catch risks before they escalate.
Train your staff face-to-face to ensure they’re confident using new tools, systems, and workflows from day one.
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IT Support