J.F. Ahern

About J.F. Ahern

Beginning as a small steam heat and plumbing shop in 1880, Ahern has since become one of the largest, most respected specialty contractors in the nation - with multi-trade expertise in mechanical contracting, fire protection and pipe fabrication.
Whether a partner on new construction/retrofit projects, servicing existing facilities, or providing prefabricated piping; Ahern consistently reduces our clients’ risk for projects and service requests of all sizes. With approximately 1,400 employees specializing in pipe fabrication, mechanical, and fire protection contracting, we offer measurable expertise and experience.

If you want to join a company that values trust, integrity and commitment - then Ahern is the company that you need.


Supply Chain Intern

May 2021 Fond du Lac, WI
“very hands on experience, treated like an entry level employee ”

Fire Protection Design Intern

February 2018 - June 2019 Deforest, WI
“I really enjoyed the work atmosphere. Ever since my interview and throughout my employment I felt like they cared about me and there seemed to be an intentional effort to build community. I was able to develop relationships with those in my office and even a few of the employees at the Fond du Lac office. It was easy to interact with those in management/superintendent roles and learn more about the opportunities in the company. ”
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