Nearly 90% of our Interns rate their experience with us as well above average and 80% of our Interns accept full-time roles after graduation. Why? Because at Ahern, Internships aren’t about making coffee or running errands - they’re about building your future with hands-on experience.
With more than 145 years as a family-owned business, we’ve built a reputation as one of the best mechanical and fire protection contractors in the country. We pride ourselves on delivering unmatched quality and innovation while providing you with job stability and support. We have an exciting opportunity for a HVAC Engineering Intern located in Milwaukee, WI
Ahern, one of the leading mechanical and fire protection contractors in the United States, has an exciting opportunity for an Intern to work within our Engineer team based in our Corporate office in Fond du Lac, WI. Building a first class reputation in the industry since 1880 did not happen by chance. It has developed over time through our commitment to conducting business ethically and by providing continuous learning, improvement and development opportunities for its number one asset, employees. You owe it to yourself to find out what Ahern has to offer!
How you will contribute:
As an Intern within the Engineering team, you will learn how to prepare detailed layouts for various HVAC projects under the mentorship of an experienced engineer. You will observe and support a seasoned engineer in providing engineering over site of the layout of these HVAC systems, equipment selections, and layouts, provide information to our estimating team relative to the bid packages, participate in the review process for HVAC specification development, layout control strategies, and provide engineering input into the operations plans for system commissioning and start-up. Our engineering team works closely with building owners and project managers to provide energy efficiency advice and assistance on new or existing systems.
What you need to qualify:
Intern candidates should be pursuing a Bachelor’s degree preferably in Mechanical Engineering or a related engineering program. Must be comfortable working in MS Office programs and passionate about deepening knowledge of mechanical systems.
What's in it for you?
As an Intern, you are empowered with genuine hands-on work experience, allowing you to make a meaningful impact and contribute to Ahern’s success.
Why complete your Internship at Ahern?
By joining Ahern, you’ll gain the stability of a company that’s been a leader in the industry since 1880, the pride of doing meaningful work, and the support of a team dedicated to your success. Don’t settle for just any job - experience what it’s like to work for the best!
Ahern is an Equal Opportunity Employer and is committed to providing a workplace free from discrimination and harassment.

Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and service projects. Founded in 1880, the company has over 1,700 employees servicing commercial and industrial customers across the United States. We partner on new construction or retrofit projects, service existing facilities, and provide prefabricated systems while reducing client risk on projects of all sizes.
Ahern's Core Purpose:
To create and maintain systems that save lives, improve the environment, and ensure personal comfort and well-being.
For additional Company information, please visit jfahern.com.
For information on starting a career with us, please visit aherncareers.com.
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