John E. Green John E. Green (JEG) is a provider of mechanical contracting services, including fabrication and installation of plumbing, HVAC, process piping, and fire protection systems. | |||
Founding Date | Founding Date 1909 | Founding Date 1901 | Founding Date 1907 |
Type | Type Private | Type Public | Type Private |
Tags | |||
Locations | Locations Highland Park, US HQ Ann Arbor, US East Lansing, US Petoskey, US Saginaw, US Southfield, US Spring Hill, US | Locations Pittsburgh, US HQ Athens, US Boynton Beach, US Columbus, US Detroit, US East Brunswick, US Lake Mary, US see more | Locations St. Louis, US HQ Boulder, US Colorado Springs, US Fort Collins, US Granite City, US Thornton, US |
Employees | Employees 3101% increase | Employees 40011% decrease | Employees 6012% increase |
Financial | |||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) $646.8m (FY, 2025) | Revenue (est.) $408.8m (Y, 2021) |

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