Business Details
Emergency
services
Trusted Mechanical Contractors & Fire Protection Services
Founded in 1880, J. F. Ahern has evolved from a small steam heat and plumbing shop into one of the largest and most respected specialty contractors in the nation. With over 1,700 employees, 85% of whom hold professional certifications, we deliver measurable expertise in pipe fabrication, mechanical contracting, and fire protection services. Our core purposecreating systems that save lives, improve the environment, and ensure personal comfortguides every project we undertake. Backed by a 144-year history of innovation, we prioritize client satisfaction through a commitment to safety, quality, and timeliness. Our teams deep industry knowledge, including NICET-certified professionals and licensed engineers, ensures tailored solutions for complex challenges across diverse sectors.Recognized with numerous project and safety awards, we measure true success by client loyalty and employee well-being. Our LEED Gold-certified facilities and nationwide service territories reflect our dedication to sustainable practices and operational excellence. From preconstruction planning to modular prefabrication, we reduce project risk while maintaining strict adherence to schedules and budgets. With 17 Midwest-based offices and capabilities extending nationwide, we combine local expertise with national resources to serve clients in industries ranging from healthcare to power generation. Our 99% client retention rate underscores our ability to consistently exceed expectations through professionalism, technical proficiency, and unwavering accountability.
Services
Pipe Fabrication
HVAC Systems
Fire Protection
Plumbing Services
Building Automation
Industrial Maintenance
Preconstruction Planning
Modular Prefabrication
Fire Sprinkler Installation
Preventive Maintenance
Highlights and features
- We have over 140 years of experience in mechanical and fire protection contracting.
- Our team includes 110+ NICET-certified professionals and licensed engineers.
- 99% of clients report meeting or exceeding project expectations annually.
- We maintain a LEED Gold-certified facility demonstrating sustainable practices.
- Nationwide service with 17 Midwest-based offices and 14.8M annual service miles.
What people say
Met or exceeded expectations
Professional and quality job
Knowledgeable team
On-time completion
No warranty rework
Services
Pipe Fabrication
Our prefabrication expertise creates precision pipe spools, mechanical components, and multi-trade modules for nationwide project delivery. With in-house fabrication shops, we ensure dimensional accuracy and material compliance while reducing field labor requirements. Our processes combine advanced technology with skilled craftsmanship to deliver systems that optimize operational efficiency and longevity.
Fire Protection
We design, install, and maintain comprehensive fire suppression systems including sprinklers, clean agent solutions, and specialized extinguishing systems. Our certified technicians ensure code compliance through rigorous testing and maintenance protocols. From initial risk assessment to system modernization, we protect facilities across diverse industries with customized fire safety strategies.
HVAC Systems
Our HVAC solutions encompass system design, installation, and maintenance for commercial and industrial facilities. With engineers and technicians trained in the latest technologies, we deliver energy-efficient climate control systems that meet ASHRAE standards. Preventive maintenance programs ensure optimal performance while minimizing operational disruptions through strategic scheduling.
Building Automation
We implement integrated control systems that optimize building performance through real-time monitoring and automation. Our BAS solutions enhance energy efficiency, occupant comfort, and system longevity while providing actionable data analytics. Custom programming ensures seamless operation across mechanical, electrical, and plumbing systems through centralized management platforms.
Preventive Maintenance
Our maintenance agreements ensure continuous operation of mechanical and fire protection systems through scheduled inspections and proactive repairs. Certified technicians use predictive maintenance technologies to identify potential issues before failures occur. This approach extends equipment lifespan, maintains compliance, and reduces emergency service requirements through documented, standards-based servicing protocols.
People
Tripp Ahern
Chairman and Chief Executive Officer
As fourth-generation leader, Tripp Ahern guides strategic direction while maintaining family commitment to quality and client relationships. With deep industry knowledge, he ensures operational excellence across all service lines.
Tony Ahern
President and Chief Operating Officer
Tony Ahern oversees daily operations, focusing on project execution and client satisfaction. His leadership emphasizes technical innovation and safety excellence across the company's 17 regional offices.
Krista Ebbens
General Counsel and Executive Vice President - Human Resources
Krista Ebbens leads legal and HR initiatives, fostering a culture aligned with company values. She develops programs that attract top talent while maintaining compliance with employment regulations and safety standards.
Jace Hierlmeier
Executive Vice President - Ahern Fire Protection
Jace Hierlmeier directs fire protection operations, combining technical expertise with industry leadership. He ensures delivery of code-compliant life safety solutions through continuous training and technological advancement.
Adam Wunderlin
Chief Financial Officer
Adam Wunderlin manages financial strategy and reporting, maintaining fiscal responsibility while supporting growth initiatives. His oversight ensures competitive pricing and investment in operational capabilities.
Questions
What industries do you specialize in?
We serve healthcare, power generation, cold storage, manufacturing, data centers, and over 20 other sectors with customized mechanical and fire protection solutions.
Do you offer nationwide services?
While headquartered in Wisconsin, we operate 17 Midwest offices and provide fire protection nationwide, with pipe fabrication capabilities extending across North America.
How do you ensure project quality?
Our quality assurance includes NICET-certified technicians, licensed engineers, and rigorous inspection protocols to maintain 99% client satisfaction rates.
What safety certifications do your teams hold?
85% of employees maintain professional certifications, including OSHA 30, NICET, and specialized trade licenses ensuring compliance with industry standards.
Can you handle emergency repairs?
Yes, our after-hours emergency service provides rapid response for critical mechanical and fire protection system failures across our service territories.
How do you approach energy efficiency?
Our building energy solutions team identifies savings opportunities through system audits, automation integration, and sustainable design practices tailored to facility needs.
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Reviews (4)
David Johnson
May 24, 2022
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Flatbed conestoga review Delivery of pipe from bull moose tube in ohio Guy running the yard and unloading was nice and quick with forklift Was a decent experience
Paul Strebe
Oct 24, 2021
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I was employed at this company for several years. Did my job very well, and very safely. One day I made a mistake and was out the door. Having over 20 years of safe experience as a CDL driver, I can tell you they do not understand what it takes to be a professional driver. Long hours, poor dispatching, slip seating, and dirty equipment are what you can expect. I you like large corporations that are all about the "numbers" and have no regard for their employees this is the place for you.
Tyler K.
Jun 18, 2020
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Two years in a row we have had JF Ahern do our businesses fire extinguisher inspections. Both times we paid at the time of inspection and both times we were also billed for the services. Last year we had to go to the main buildings lobby twice to have the issue corrected. This was after leaving multiple messages (Over the course of two weeks) that were never returned from the lady in charge of these types of accounts.
They even tried to charge us for a long distance service even though we are only a couple blocks from their location. The ladies in the lobby were very helpful but otherwise it was a two month process to get this issue resolved and I am not looking forward to the process again now that it has happened for the second consecutive year in a row.
They even tried to charge us for a long distance service even though we are only a couple blocks from their location. The ladies in the lobby were very helpful but otherwise it was a two month process to get this issue resolved and I am not looking forward to the process again now that it has happened for the second consecutive year in a row.
Larry Wright
May 04, 2020
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Enjoying the annual retirees luncheon. It's always nice seeing people that I worked with many years ago
