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Multi-Trade Services

Building SystemsCommercial Contracting Services

Whether we’re providing mechanical or fire protection industrial contracting service, our success is built on an unwavering focus on delivering what matters most to our clients; expertise, quality, and timeliness. We can help you reach your project goals while maintaining a high level of service. With a team of licensed professionals, you can trust Ahern to get the job done right the first time.

Whether a partner on new construction or retrofit projects, servicing existing facilities, or providing prefabricated piping; Ahern consistently reduces its clients’ risk for projects and service requests of all sizes.

Multi-Trade Services

Multi-Trade Services By Location

Ahern has 15 office locations throughout the Midwest. We offer fire protection expertise in all geographies, as well as new installations throughout the U.S.; mechanical installations and service within Wisconsin; and pipe fabrication work in the U.S. and beyond. 

Ahern Pipe Fabrication

Pipe Fabrication

At Ahern, fabrication services are our specialty. We prefabricate pipe spools, mechanical components, skids, and multi-trade modules that ship to various project sites throughout North America.

Ahern Plumbing


Whether for the immediate distribution of clean water or the safe transportation of unwanted waste, quality commercial plumbing services are a key component of any building.

Preventive Maintenance

Ahern offers mechanical preventive maintenance agreements (PMAs) and fire protection system and equipment inspection services. Mechanical PMA programs can help ensure your systems are operating efficiently and can help to reduce costly emergency repairs or replacements. Fire protection system...


Ahern has been designing, installing, and servicing HVAC systems since the company's inception over a century ago. Our team of professional engineers, licensed designers, experienced project managers, and skilled foremen can bring your next HVAC project from idea to reality with our HVAC system installation team. 

Building Control Systems

Building controls – also called Building Automation Systems (BAS), Building Automation and Control Systems (BACS), or Building Control System (BCS) – have quickly become vital in maximizing efficiency, sustainability, and profitability in today’s buildings.

Building Energy Solutions

Building Energy Solutions

Ahern employs over 70 NICET-Certified professionals, 10 licensed PEs, 8 LEED APs, and 4 EITs. Our building energy solutions team will help you better manage your utility spending by identifying and recommending energy-saving alternatives.

Industrial Services

We offer a full range of solutions for industrial and manufacturing process environments including industrial installation, repair and replacement, machine automation and fabrication.

Preconstruction Services

As a preconstruction adviser, Ahern’s knowledge and experience benefit general contractors, architects, and building owners through early involvement in system selection that meets the end user's goals and budget.

Fire Protection & Life Safety

Last year, we provided life safety inspections to over 24,900 facilities. This includes fire extinguishers, kitchen systems, dry chemical systems, emergency lighting, fire alarm testing, and fire/smoke damper testing.