Corporate Headquarters
3374 Commercial Avenue
Northbrook, IL 60062
24/7 Main and Emergency Number:
(847) 291-1413
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UPS, Battery, and Datacenter Precision Cooling Services
Emergency Generator and Automatic Transfer Switch Services
Cellular Tower AC/DC Systems Services

Contact Center

24/7 Main and Emergency Number:  (847) 291-1413

Corporate Headquarters:
3374 Commercial Avenue
Northbrook, IL  60062

Main Office: (847) 291-1413
Main Fax:     (815) 338-7143



Direct email listing:
General Information about LionHeart: info@lionheartengineering.com
Administration and Customer Service: admin@lionheartengineering.com
Sales, Marketing, and Promotions: sales@lionheartengineering.com
Generator/ATS Service Manager: GenService@lionheartengineering.com
UPS/Battery/Data Center Cooling Manager: UpsService@lionheartengineering.com
Wireless AC/DC Systems Manager:  AC-DCService@lionheartengineering.com


Contact Us Directly:

Service Operations and Hours
Servicing diverse markets, LionHeart operates 24/7 to meet our clients’ operational requirements and maintain our position as one of the industry’s leading power protection service companies.  To serve our customers individual needs, our Service Team regularly performs preventative maintenance and repair work after normal business hours and on weekends.  When it comes to emergencies, there is no company more responsive to your emergency call than the people at LionHeart.

Service Coverage Area
LionHeart’s primary service markets are Illinois, Wisconsin, Indiana, Michigan, and the Dallas/Ft. Worth region. We readily extend our critical systems expertise to select National Accounts to provide comprehensive coverage.

Emergency Response Times
There is no company more responsive or quicker to assist in an emergency than LionHeart.  Because all LionHeart service technicians drive their service vehicles home at night, after-hours emergencies are handled in an expeditious manner while labor and travel costs are minimized.  Although our standard guideline for emergency calls is 4 hours or less, the average emergency response time is much closer to 2 hours to get your system back on line as soon as possible.

Outside normal working hours, LionHeart Service Level Agreement holders have first response preference should their critical power system develop a fault condition requiring immediate attention.

Non-contract customers can, also, call the 24/7 emergency number for immediate service.



Preventive Maintenance
Predictive Maintenance
Corrective Maintenance
Local and Remote Notification
Disaster Preparedness Planning

Operational Troubleshooting
Component Failure Analysis
Repair Replace Options
Data Center Cooling Tests
Battery Replacements & Disposal

Battery Discharge Test
Load Bank Testing
Load Transfer Testing
NFPA 110 & 111 Testing
IEEE 1188 & 450 Testing

Critical Power Solutions
Electrical Engineering
Turnkey Installations
Technology Training
Independent Commissioning


Corporate Headquarters: 3374 Commercial Avenue | Northbrook, IL 60062
Emergency Phone Numbers: Midwest Region (847) 291-1413