Engineering Internship Summer 2026

Posted 15 Days Ago
Be an Early Applicant
Waukesha, WI
In-Office
Internship
Energy • Renewable Energy
The Role
The Engineering Internship offers hands-on experience in energy systems, mentorship, and training for students enrolled in engineering programs, fostering professional growth and skills development.
Summary Generated by Built In
Why Work at Rehlko

We have met today's energy needs while planning for tomorrow's for over 100 years. Beginning with the first modern generator, the Rehlko Automatic Power & Light, launched in 1920, Rehlko has been an innovative leader in energy resilience. 

Our product range includes engines, generators, power conversion, UPS systems, EV components and electrification solutions, microgrid controls and management, clean energy solutions, and much more that serve a broad spectrum of OEM, residential, industrial, and commercial customers.

Our priorities are global: the stability from steady energy sources and reliable back-ups. The power to be able to harness energy, and the freedom of not being dependent on an aging centralized grid. The confidence that clean energy solutions offer when it comes to a sustainable world, and the commitment to keep innovating towards greater impact.

At Rehlko, our team members are the essential energy that powers our organization’s success. We are committed to fostering a safe and sustainable work environment where safety is everyone’s responsibility. We empower every team member to actively participate in our Zero Is Possible safety culture by encouraging open communication, proactively reporting hazards, following protocols, and suggesting improvements. Join us in creating an energy resilient world for a better future!

Why You Will Love this Job:

Job Description

What Sets Our Early Talent Program Apart?

Our Early Talent Program is designed to be a transformative experience—providing real impact, professional growth, and meaningful connections. Here’s what makes it exceptional:

Personalized Mentorship

  • One-on-one guidance from industry leaders committed to your growth.

Impactful Projects

  • Hands-on work that directly contributes to Rehlko’s purpose of building an energy-resilient future.

Professional Development

  • Access to workshops, training, and networking opportunities that accelerate both your skills and career readiness.

Inclusive Culture

  • A inclusive, collaborative environment where every perspective is valued and every voice matters.

Continuous Feedback

  • Regular coaching and check-ins to support your learning and long-term development.

The Unique Spark You Bring

  • Enrollment Requirement: Must be a junior, senior, or graduate student enrolled in an accredited college, university, or master’s program for the duration of the term. Must be authorized to work in the United States now and in the future.

  • Skill Proficiency: Candidates should bring strong attention to detail, clear communication skills (written and verbal), and the ability to manage multiple priorities effectively.

  • Gain hands-on experience with the full project process—from initial design through construction and final startup.

  • Work with teams involved in mechanical, electrical, or energy systems; exposure to power generation or construction projects is a plus.

  • Learn how real-world engineering projects move from concept to completion


 

About Us

Rehlko proudly offers a rich history steeped in creativity and commitment to our associates and communities, along with competitive benefits and compensation. Our Purpose—Creating an energy resilient world for a better future—and Values: Curiosity, Trust, Pace, and Excellence, are important cultural components that shape the way we work and relate to one another. Learn more about Rehlko at http://www.rehlko.com/who-we-are.

In addition to the investment in your development, Rehlko offers a benefits package including a competitive salary, health, vision, dental, 401(k) with Rehlko matching, and more!?

Rehlko is an equal opportunity employer that prohibits discrimination and will make decisions regarding employment opportunities, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination, without regard to race, creed, color, ethnicity, religion, sex, pregnancy, childbirth, or related medical conditions, genetic information, age, national origin, citizenship, ancestry, caste, mental or physical disability, marital or familial status, sexual orientation, gender identity or expression, genetic information, political belief or affiliation, union membership status, military status, veteran status, or any other characteristic protected by national, state, local, or other applicable laws.

Americans with Disabilities Act (ADA)

 It is the policy of Rehlko to comply with all applicable provisions of the Americans with Disabilities Act (ADA) and corresponding national, state, local, or other applicable laws. Rehlko will not discriminate against any qualified associate or applicant with respect to any terms, privileges, or conditions of employment because of a person's physical or mental disability. Rehlko will provide a reasonable accommodation to associates or applicants with disabilities, in accordance with applicable laws. If you have a disability and require an accommodation in the application process or during the course of employment, please contact [email protected]. Rehlko is an equal opportunity/affirmative action employer.

Our Values

Curiosity – Seek, learn, share

Trust – Go farther together

Pace – Focus to go faster

Excellence – Find the win every day

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The Company
HQ: Milwaukee, Wisconsin
2,387 Employees

What We Do

Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.

Formerly, for more than 100 years as Kohler Energy, our teams have excelled, reliably meeting today’s energy needs while planning for tomorrow’s. Now, with a new name and increased focus, we are giving our customers more control over where energy is sourced and where it goes, from industrial applications to your own backyard. Our solutions give people the resilience they need to keep building a brighter future, together.

At Rehlko, we innovate relentlessly because we know we don’t just offer energy solutions – we are creating an energy resilient world for a better future.

We provide worldwide solutions thanks to our regional locations in NA, EMEA, LATAM, APAC, and India.

Learn more about our products:
Power Systems North America: https://www.powersystems.rehlko.com
Power Systems EMEA: https://www.powersystems.rehlko.com/emea
Engines: https://www.engines.rehlko.com

Rehlko’s affiliated brands include Kohler Home Energy, Kohler Uninterruptible Power, Curtis Instruments, and Clarke Energy.

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