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. | Apollo Mechanical Contractors Apollo Mechanical Contractors (also known as Apollo Sheet Metal) is a company that provides construction management solutions. | |||
Founding Date | Founding Date 1909 | Founding Date 1901 | Founding Date 1981 | Founding Date 1907 |
Type | Type Private | Type Public | Type Private | 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 2,000 | Employees 6012% increase |
Financial | ||||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) $646.8m (FY, 2025) | Revenue (est.) $600m (Y, 2024) | Revenue (est.) $408.8m (Y, 2021) |

Limbach Holdings is a provider of integrated building systems solutions.
View companyApollo Mechanical Contractors (also known as Apollo Sheet Metal) is a company that provides construction management solutions.
View companyMurphy Company is a mechanical contractor that provides engineering solutions.
View company