Managed IT · Fenton, MO · Est. 2003

Your systems stay up. Your data stays yours.

MGB Systems is an IT partner for small and midsize businesses and enterprise organizations across the United States: onsite where you are, remote everywhere else. From day-to-day support to CIO-level strategy, penetration testing, and Microsoft 365 hardening, we keep your systems running and your data secure.

Call 314-833-6500 What we do

Data centers · Saint Louis, MO · Fremont, CA

Your servers, in our data centers.

Private cloud, dedicated servers, and co-location in two facilities, in Saint Louis, Missouri, and Fremont, California, for geographic redundancy. If one region goes dark, your data and workloads are already safe on the other side of the country.

Cloud & data centers Call 314-833-6500

Server racks with network cabling and status lights — Private cloud · Dedicated servers · Co-location

Security audits · Penetration testing · Microsoft 365 hardening

Find the gaps before attackers do.

We test your network, people, and Microsoft 365 tenant the way an attacker would, then rank what we find by real risk and help you close it, with virtual CIO guidance for the bigger decisions that follow.

Security services Talk to us

01 · Services

What we do

We work the way your organization needs: complete IT outsourcing, where we are your IT department; co-managed IT, working alongside your existing staff; or escalation support, where your team handles the day-to-day and we're the senior engineers behind them. Either way, you get experienced people who know your environment.

Managed IT & monitoring

Complete outsourcing, co-managed IT, or escalation support behind your team.

Virtual CIO

IT strategy, budgets, and roadmaps from an experienced technology leader.

Security audits & penetration testing

Ongoing daily penetration testing finds the gaps before attackers do.

Microsoft 365 hardening

Lock down identity, email, and data in your Microsoft 365 tenant.

Backup & disaster recovery

Immutable backups, tested restores, results you can see.

AI & productivity

Copilot and Claude rollout with training and governance.

Cloud & data centers

Geo-redundant hosting in Saint Louis, Missouri, and Fremont, California.

VoIP & telephony

Phones and the network they run on, from one provider.

See all services →

02 · About

Since 2003, the same principle

MGB Systems was founded in 2003, and we've grown steadily since by doing one thing consistently: giving customers the best service and the right solution, even when it isn't the most profitable one.

Our technicians hold A+, Network+, and CCNA certifications, and we are deliberately selective about the vendors we partner with. We would rather support fewer platforms properly than resell everything badly.

We work onsite across the entire United States from our headquarters in Fenton, Missouri, and support clients remotely anywhere in the world.

Talk to a technician, not a form.

Call us and you'll talk to someone who can actually look at your systems.