JF Ahern, a pipe fabrication, mechanical, fire protection and building automation specialty contractor for commercial and industrial projects, has stood the test of time and been named ENR Midwest’s 2020 Specialty Contractor of the Year.
Founded in 1880, the company has 1,400 full-time employees. Based in Fond du Lac, Wis., the firm also has 14 offices throughout the upper Midwest. About 2% of its employees are part-time workers.