MZI specializes in designing and building commercial and industrial heating, ventilation, and cooling systems for new and existing systems. MZI leads the way in mechanical construction and can successfully manage projects of all sizes.

Our Services

As one of Chicago’s leaders in power transmission, delivery, and substation systems, we exceed client expectations at every turn. Our reputation and relationships with utility companies, specialized equipment, low customer impact, and efficient union crews has provided our clients with savings for consumers and businesses. We optimize voltage, create energy efficiencies, and plan for safety in future contingencies.


  • Water Chillers - Centrifugal Absorption
  • Cooling Towers
  • Screw & Reciprocating Fan Systems
  • Computer Room Air Conditioning Equipment
  • Boilers - Steam and Hot Water
  • Pumps - Heating/Cooling/Booster/Ejectors
  • Temperature Controls - DDC
  • Electric and Pneumatic
  • Rooftop HVAC Equipment
  • Refrigeration Equipment
  • Chemical Water Treatment


  • Mechanical HVAC Systems
  • Process Piping Systems
  • Industrial Piping Systems
  • Steam & Condensate Piping Systems
  • Temperature Controls
  • Energy Management & Building Automation
  • Commissioning Services- DDC
  • Design-Build & Engineering
  • 24-Hour Service
  • Preventative Maintenance Contracts

Our Services

MZI sits as a leader in Telecommunications within the Midwest and across the United States. Powered by a belief that everyone everywhere can be connected, we deliver top tier communication infrastructure to ensure faster speeds and reliable cellular technology. 

Recent Projects

MZI Group Services

Welcome to MZI. At MZI, we serve a diverse range of public and private sector clients seeking help with telecom, electrical and mechanical construction, energy infrastructure, utility projects, design-build and facility services in Chicagoland, the Midwest and across the United States of America. We have been a leading player in our industry since way back in 1999.


At MZI, we are proud to be one of the leading suppliers of electric solutions in the Midwest and across the nation. We have an extensive background in providing first-class electric solutions and relationships with utility providers to make it seamless.  

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Power & Utility

As specialists in power & utility, we provide comprehensive solutions to even the most complex challenges. With established partnerships in the industry, MZI can successfully manage projects of all sizes that achieve excellence.  

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Building Services

Our highly specialized labor force, as well as our fully integrated system of services, allows us to deliver outstanding value in facility management. We optimize our services for clients to receive the highest level of care.  

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Serving a wide range of clients from the public and private sectors, we specialize in the design-build and plan-spec of commercial and industrial heating, ventilation and cooling systems.

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With over 100 years of experience, our deep industry expertise, digital innovation, and utilization of leading-edge technology drives tangible success in connecting clients and communities across the nation. 

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Exceeding client’s expectations, while providing quality and best-in-class results, we implement installations for commercial, educational, healthcare, hotel, and industrial facilities both direct to building engineers and direct to owner.  

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