Ahern Ranked No. 159 on ENR’s Top 200 Environmental Firms List

Fond du Lac, WI, October 8, 2026 - J. F. Ahern Co. has been ranked No. 159 on Engineering News-Record's 2026 Top 200 Environmental Firms list, advancing 17 positions from its No. 176 ranking the previous year.

The annual ENR ranking recognizes firms providing construction, engineering, consulting, remediation, and other services across the environmental market. Rankings are based on environmental services revenue from the previous year.

Wastewater treatment accounted for 77% of Ahern's environmental revenue, followed by water supply and treatment at 15% and air quality and clean energy at 8%. Ninety percent of the company's environmental revenue came from state and local clients.

Ahern's continued advancement on the list reflects the company's experience supporting critical water and wastewater infrastructure through mechanical construction and related services. From treatment facilities and process piping to complex mechanical systems, Ahern's teams work alongside customers to deliver reliable infrastructure designed to meet long-term operational needs.

Ahern's No. 159 ranking demonstrates the company's continued presence within this growing market and the contributions of employees who deliver complex environmental and infrastructure projects for customers throughout the region.

Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and service projects. Founded in 1880, the company has over 1,900 employees servicing commercial and industrial customers across the United States. To keep up with the latest company news and events, visit jfahern.com or follow them on Facebook or LinkedIn.