In 1909, John E. Green founded a plumbing and heating business with $20 in cash in Highland Park, Michigan. John E. Green's sons built upon what their father started and rapidly expanded the business in the industrial and institutional fields, laying the groundwork for what the company is today. John E. Green Company (JEG) is a national leader in the mechanical contracting & fire suppression industry. We continually strive to improve all our project delivery processes through innovation, technology, and adhering to our Core Values of Safety, Quality, Integrity and Service. Over the years, JEG has gained knowledge installing all types of mechanical systems that has created an experience level second to none. JEG prides itself on being recognized by Engineering News Record as one of the largest specialty contractors in the United States.