Top Managed IT Companies in Milwaukee

Great Lakes Tech Services, LLC

Why Choose Great Lakes Tech Services, LLC

✓ Verified Provider Est. 2011
Waukesha, WI
1–9 employees
Founded 2011
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Great Lakes Tech Services, LLC is a managed IT services provider based in Waukesha, WI, operating since 2011. It focuses on Managed IT Services, Backup & Business Continuity, IT Help Desk & End-User Support, VoIP & Business Phone. Compare it against other Milwaukee managed IT providers, then request a quote.

Vetted by the Best IT MSP editorial team · Last updated June 2026

About Great Lakes Tech Services, LLC

Great Lakes Tech Services, LLC, founded and led by Mark Mullarky, has provided managed IT support to Southeastern Wisconsin businesses (Waukesha, Milwaukee, and Jefferson counties) for over 16 years, and is an MSP Alliance member.

Services Offered

🖥️
Managed IT Services
💾
Backup & Business Continuity
🛟
IT Help Desk & End-User Support
🔌
VoIP & Business Phone
🪟
Microsoft 365

Why Choose Great Lakes Tech Services, LLC

📍

Based in Waukesha

Great Lakes Tech Services, LLC is headquartered in Waukesha, WI, so Waukesha businesses get a local team for on-site work instead of a distant call center.

16+ years serving SE Wisconsin businesses

16+ years serving SE Wisconsin businesses

Responsive, no-queue emergency support

Responsive, no-queue emergency support

Location

Waukesha, WI

Certifications & Compliance

MSP Alliance member
Norton Verified

Frequently Asked Questions

Which IT services does Great Lakes Tech Services, LLC provide?

Great Lakes Tech Services, LLC delivers Managed IT Services, Backup & Business Continuity, IT Help Desk & End-User Support, VoIP & Business Phone, Microsoft 365 to organizations across Milwaukee, WI.

What area does Great Lakes Tech Services, LLC serve?

Great Lakes Tech Services, LLC is based in Waukesha, WI and supports businesses across Milwaukee and the greater metro area.

When did Great Lakes Tech Services, LLC start?

Great Lakes Tech Services, LLC has been operating since 2011.

Is Great Lakes Tech Services, LLC certified?

Great Lakes Tech Services, LLC carries MSP Alliance member, Norton Verified.