JF Ahern is a mechanical and fire protection contractor that's lasted 140 years in Fond Du Lac, Wis. The company was named ENR Midwest Specialty Contractor of they Year, in part, because it worked on projects in 10 of ENR Midwest’s 11 states last year.

Mechanical Inc. embraces technology for prefabrication and faster delivery

The Midwest Specialty Contractor of the Year provides everything from wind and solar support to oil and gas pipelines and is helping the recovery from Hurricane Irma