Business Details
50+ Years
experience
Emergency
services
Trusted Mechanical & Fire Suppression Contractors in Highland Park, MI
John E Green has been a national leader in mechanical contracting and fire suppression for over a century. Our Core Values of Safety, Quality, Integrity, and Service guide every project we undertake. With 116 years of continuous operation, we have developed unmatched expertise in installing mechanical systems across diverse industries. Recognized by Engineering News Record as one of the largest specialty contractors in the U.S., we combine innovation, technology, and a 5th-generation family legacy to deliver exceptional results.Our team of 1,000+ skilled professionals serves markets spanning healthcare, industrial, automotive, education, and resort/entertainment sectors. We maintain rigorous safety standards while providing 24/7 emergency service to meet critical client needs. Our commitment to quality extends through design-build methodologies and fabrication capabilities tailored to complex project requirements. Operating across the Eastern United States, we uphold our reputation as trusted partners in mechanical solutions.
Services
Piping
Plumbing
Fire Suppression
HVAC
Fabrication
Design Build
Details
- Year established: 1909
Highlights and features
- 116 years of continuous mechanical contracting expertise
- Recognized by Engineering News Record as top specialty contractor
- 5th-generation family-owned business legacy
- 1,000+ skilled trade professionals nationwide
- 24/7 emergency service with rapid response capability
Services
Fire Suppression
Our fire suppression systems combine advanced engineering with decades of field experience to protect commercial and industrial facilities. We design, install, and maintain code-compliant solutions tailored to specific occupancy risks. Our team specializes in complex system integration with existing mechanical infrastructure.
HVAC
We deliver comprehensive HVAC solutions for new construction and retrofit projects, focusing on energy efficiency and system longevity. Our engineers optimize airflow dynamics while maintaining seamless integration with plumbing and fire suppression systems. Preventative maintenance programs ensure peak performance year-round.
Design Build
Our design-build approach streamlines project delivery by combining engineering, procurement, and construction under one contract. This methodology reduces timelines while maintaining quality control across mechanical, plumbing, and fire protection systems in complex facilities.
Fabrication
In-house fabrication capabilities enable precision manufacturing of custom piping systems and mechanical components. Our welders meet ASME and AWS standards, producing shop-fabricated assemblies that reduce field installation time and improve system consistency.
Piping
We install and maintain complex piping systems for commercial and industrial applications, handling high-pressure, high-temperature, and specialty fluid transport requirements. Our technicians work with various materials including steel, copper, and engineered plastics to meet specific project demands.
Questions
What services does John E. Green Company offer?
We provide mechanical contracting, fire suppression systems, plumbing, HVAC, fabrication, and design-build solutions across multiple industries.
Is emergency service available after hours?
Yes, our 24/7 emergency service responds to critical mechanical and fire suppression needs nationwide.
Which industries do you serve?
We work in healthcare, industrial, automotive, education, municipal, and resort/entertainment sectors across the Eastern U.S.
How long has your company been in business?
We've delivered mechanical solutions since 1909, maintaining family ownership through five generations.
What safety standards do you follow?
Our operations adhere to rigorous safety protocols exceeding industry requirements, with dedicated safety-certified personnel.