From the Motor City to the Windy City

Now in Chicago

WJ O’Neil Chicago LLC brings 30 years of mechanical service expertise to facilities managers in Chicagoland. Our focus – understand what you need, recommend optimal solutions and deliver fast.

It’s pretty simple. We’ll make your priorities ours – then roll up our sleeves and get them done.

Interested? We'll give you a call. Tell us what you'd like to get done >


Servicing

  • Controls systems
  • Chillers
  • Boilers
  • Built-up systems
  • Environmental chambers
  • Computer rooms
  • DDC
  • Pneumatic controls
  • HVAC systems of all kinds

Providing

  • Preventative maintenance programs
  • Total energy management programs
  • Complete systems design, modernization, or replacement
  • Retrofitting and new installations
  • Full mechanical life warranty service for new installations

Supporting

  • Multi-unit residential
  • Healthcare / Pharmaceutical
  • Commercial / Office
  • Industrial
  • K-12 and Higher Education

MIDWEST REGION

W.J. O'Neil Chicago, LLC
224 North Justine Street
Chicago, Illinois 60607
312.470.6300
312.470.6305 Fax

CORPORATE HEADQUARTERS

35457 Industrial Dr.
Livonia, Michigan 48150
734.458.2300
734.458.2305 Fax

24-hour emergency service
734.266.3338