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Eliminate IT Downtime with Expert IT Company in St. Louis

Reasons to choose OCCSI among other IT firms:

Resolve IT issues fast with 29.5-minute avg. resolution time and dependable company support.

Cut IT costs with managed services and flexible one-year contracts tailored to your business.

Align IT with business goals through expert consulting and strategic guidance from a vCIO.

Get 24/7 support with a 15-minute technician response time for all your IT service needs.

Access Tier 1–4 IT experts without the payroll costs—complete support for all tech challenges.

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From St. Louis' Premier IT Firm

OUR AWARDS & CERTIFICATIONS
TESTIMONIALS

See What Our Clients are Saying…

28+ Years
Proven track record of delivering reliable IT solutions
3,796 Users
Supporting thousands of end users with fast, expert IT support
29.5 Minutes
Swift resolution for all IT issues

Our Clients

About Onsite Computer Consulting Services Inc. IT Company

Serving over 100 companies for more than 28 years, OCCSI brings seasoned IT expertise to businesses that can’t afford downtime. Backed by 24/7 monitoring and support, our team ensures your technology works for you.

OUR EXPERTISE

Work with an IT Company That Simplifies Everything

We Manage IT—You Stay in the Loop

We handle updates, upgrades, user issues, and vendor calls—while keeping you informed every step of the way. Clear communication, fast response, and zero micromanagement.

Future-Proof Your Business

Upgrade outdated systems and scale confidently with expert cloud and infrastructure support. We guide smart deployments for long-term stability and growth.

Vendor Management, Simplified

We act as your single point of contact for all tech vendors—resolving issues faster, cutting through jargon, and saving your team hours of back-and-forth.

St. Louis IT Company

Expert IT Company in St. Louis

Grow with confidence using IT strategies designed to streamline workflows, protect your data, and support long-term performance.
Managed IT Services

Reduce IT costs and resolve issues faster with 24/7/365 proactive management and a 98.68% CSAT rating.

IT Consulting

Navigate tech challenges with customized IT consulting and future-proof strategies for over 103 businesses.

IT Helpdesk

Resolve issues swiftly with our helpdesk, connecting you to experts and achieving an average resolution time of 29.5 minutes.

IT Support

Resolve IT issues quickly with responsive support that keeps your operations running without disruption.

Network Support

Enhance network performance with 24/7 monitoring and proactive support tailored to your business needs.

Cloud Services

Enhance cloud efficiency and security with seamless migration and integration, backed by 28 years of industry expertise.

Digital Transformation

Drive innovation with our digital transformation services, guided by dedicated vCIOs for strategic support and future planning.

Cybersecurity

Protect your business with advanced cybersecurity solutions, including intrusion prevention, tailored to meet your unique needs.

Business Continuity

Ensure operational resilience with tailored business continuity solutions, providing peace of mind with rapid data recovery.

Security That Doesn’t Sleep, So You Can

Cyber risks evolve by the hour, which is why our security monitoring never takes a day off. OCCSI provides 24/7/365 protection with real-time threat alerts, proactive system hardening, and layered defenses built to stop phishing, ransomware, and insider attacks before they escalate.

You get enterprise-grade security built on Zero Trust architecture, Multi-Factor Authentication (MFA), and full Security Operations Center (SOC) visibility—plus compliance support for HIPAA, PCI, and more. We keep your network clean, your data safe, and your business one step ahead of threats.

While you stay focused on customers and operations, we stay laser-focused on protecting your environment—every hour, every day.

IT Company St. Louis

Onsite Computer Consulting

IT Company in St. Louis

Spot Issues Before They Become Business Disruptions

See how proactive monitoring and fast response times keep your operations smooth.

Our Trusted Partners

Frequently Asked Questions

What Types of Services Does Your IT Company Offer?

We cover everything you’d expect from a true IT partner. That includes network security, cloud setup, disaster recovery, and fully managed services—plus strategic consulting to help you scale with confidence. We also tailor solutions for your environment instead of forcing a one-size-fits-all model. Whether you need end-user support, compliance guidance, or help navigating vendor relationships—we’re ready to jump in.

How Does Your IT Company Ensure Network Security?

Security is baked into everything we do. We deploy layered protection with tools like firewalls, endpoint monitoring, MFA, and intrusion prevention. But it’s not just about the tools—it’s the approach. We’re watching your systems 24/7/365, patching vulnerabilities, and alerting you to real-time risks. If there’s a threat, we’re already on it. You’ll know your systems are covered, even when you’re off the clock.

What’s the Onboarding Process Like With Your IT Company?

No guesswork. We start by auditing your systems, learning your goals, and identifying weak spots. From there, we build a clear onboarding plan—fast, focused, and zero fluff. We handle migrations, integrations, and train your staff without slowing down your workflow. You’ll know what’s happening at each step, and we’ll get you up and running quickly—usually within 14 days.

How Does Your IT Company Handle Emergencies?

We don’t wait until it’s a disaster. Our 24/7 team monitors your systems and responds immediately—typically within 15 minutes. Whether it’s a crashed server or a breach attempt, we prioritize it and fix it fast. We’ve seen it all, and we know how to triage, communicate, and take action without causing more confusion. Emergencies don’t wait, and neither do we.

What Makes Your IT Company Different From Others in St. Louis?

It starts with how we treat your business—like it’s our own. We don’t overpromise or disappear behind ticket systems. You get one-year contracts, direct access to our team, and clear communication from day one. Our technicians speak your language, our systems prevent downtime, and our expertise spans everything from compliance to infrastructure design. We don’t just offer support—we offer solutions that stick.

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St. Louis IT Company Services That Go Beyond Basic Support

Unify your IT environment by consolidating vendors, systems, and services into a single, streamlined operation.

Modernize outdated systems with scalable, secure infrastructure built for growth, mobility, and resilience.

Integrate your business tools to eliminate inefficiencies, reduce friction, and improve productivity across teams.

Simplify compliance tasks with guided support for HIPAA, PCI, and NIST—without drowning in technical details.

Prevent downtime and data loss with routine health checks and proactive issue detection before they escalate.

Get a Quote from our IT Company in St. Louis

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