Major Systems, INC.

Commercial Mechanical Contractor

Residential HVAC Service and Installation

DDC Systems Controls and building automation

Your Partner for the 21st Century

Major Systems, INC. is a Woman/Minority owned business located in Wauwatosa and is an industry recognized leader in:

Mechanical Contracting

Datacom and Communication Systems

Green Building Technologies

Systems Controls

Residential, Commercial, Industrial Service

Major Systems, INC. with single source reliability. We integrate the latest technology with high quality products and services to help save you money and time.

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