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Mechanical, Fire Protection& Fabrication Contracting that canReduce Your Project Risk.

One integrated multi-trade solution for your service and construction projects.

Industrial Services
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Pipe Fabrication
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HVAC
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Fire Protection & Life Safety
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Plumbing
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Building Controls
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Preconstruction Services
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Multi-Trade Modular Prefabrication
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99%

In 2019, 99% of client survey responders reported we met or exceeded expectations.

I’ve been pleased and impressed with the professional and quality job Ahern has provided. Working with one company on more than one system made things easier.
Moline Water Treatment Plant

Ahern Project Showcase - Advocate Aurora Health Hospital & Medical Center

Ahern Project Showcase - Advocate Aurora Health Hospital & Medical Center

Ahern Fabrication Shops

Ahern Fabrication Shops

Ahern Pipe Fabrication Shop

Ahern Pipe Fabrication Shop

Ahern Fire Protection Shop

Ahern Fire Protection Shop

Achieving Safety Excellence

Achieving Safety Excellence

Froedtert Pipe Installation

Froedtert Pipe Installation

Forest Park Middle School - Franklin, WI

Forest Park Middle School - Franklin, WI

What's New?

Ahern Continues to Rank Among Wisconsin’s Top Companies
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J. F. Ahern Ranks Among Top Specialty Contractors in the U.S.
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Fall 2020 Career Fairs Go Virtual
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Ahern Fire Protection Serving Chicagoland for Over 30 Years
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Ahern Named ENR Midwest Specialty Contractor of the Year
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Is Your Fire Sprinkler System Ready For Winter
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Indoor Air Cleaning Technologies for Your Facility
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Ahern Partners on 10 of the Top Projects of 2019
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Menomonie has a New Mechanical Superintendent
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