Application Engineer Internships
Application engineer internships give university students, recent graduates, and early-career switchers hands-on project experience, mentorship from working application engineers, and, at many employers, a path toward a full-time offer. Openings are concentrated across Manufacturing, Electronics & Hardware, and Distribution & Wholesale, with Tesla, ByteDance, and Eaton among the employers posting roles now.
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Eaton’s ES AMER PCS division is currently seeking a Co-op Application Engineer.
The hourly rate for this position is $28.00 per hour.
Please note the salary information shown above is a general guideline only. Salaries are based upon candidate skills, experience, and qualifications, as well as market and business considerations.
What you’ll do:
We make what matters work.
At Eaton, we believe that power, whether it’s electrical, hydraulic, or mechanical power - is a fundamental part of people’s lives. Technology, transportation, energy, and infrastructure—these are things the world relies on every day. That’s why we are dedicated to helping our customers across the world find new ways to manage power more efficiently, safely, and sustainably. And we’re committed to improving people’s lives, the communities where we live and work, and the planet our future generations will depend on. Because that’s what really matters–and we’re here to make sure it works.
While our vision is to improve the quality of life and the environment through the use of power management technologies and services, our culture and what we value can be represented in three essential leadership attributes expected of all Eaton employees.
We Think Big - We take smart risks, lead with curiosity, challenge convention, and innovate with speed.
We Act Boldly - We prioritize what matters most, lead decisively and perform to the highest standards.
We Win Together - We lead with integrity, empower one another, and build trust through courage and inclusion.
About Eaton:
As a power management company with 2025 sales of $27.4 billion, Eaton provides energy-efficient solutions that help our customers effectively manage electrical, hydraulic, and mechanical power more efficiently, safely and sustainably. We have approximately 97,000 employees across the world and sell products to customers in more than 160 countries.
What you’ll do:
The primary function of the Application Engineer Co-op is to provide technical application support to customers, sales and other Bussmann division departments. The Application Engineer Co-op will support more technical and in-depth email inquiries. The Application Engineer Co-op will be viewed as the technical expert on Bussmann series products and their application.
Job Responsibilities
- Provide in-depth technical application support to customers via phone, chat, and email.
- Actively engage in the training of customers and Division personnel.
- Develop and update training materials.
- Act as the technical expert from the factory.
- Provide guidance on NEC, UL, CSA, & IEC requirements for overcurrent and overvoltage protection
Qualifications:
- Working toward a B.S. in Engineering from an accredited institution.
- Minimum overall cumulative GPA of 2.8.
- Eaton will not consider applicants for employment immigration sponsorship or support for this position. This means that Eaton will not support any CPT, OPT, or STEM OPT plans, F-1 to H-1B, H-1B cap registration, O-1, E-3, TN status, I-485 job portability, etc.
- No relocation benefit is offered for this position. The candidate must reside within 50 miles of Ellisville, MO.
Preferred Qualifications:
- Major in Electrical Engineering.
- Two years of coursework completed.
All positions may require participation in video and in-person interviews as part of the hiring process. All candidates will be evaluated based on job-related competencies, and all candidates’ privacy rights and data security will be protected in accordance with applicable laws.
We are committed to ensuring equal employment opportunities for all job applicants and employees. Employment decisions are based upon job-related reasons regardless of an applicant's race, color, religion, sex, sexual orientation, gender identity, age, national origin, disability, marital status, genetic information, protected veteran status, or any other status protected by law.
Eaton believes in second chance employment. Qualified applicants with arrest or conviction history will be considered regardless of their arrest or conviction history, consistent with the Los Angeles County Fair Chance Ordinance, the California Fair Chance Act and other local laws.
You do not need to disclose your conviction history or participate in a background check until a conditional job offer is made to you. After making a conditional offer and running a background check, if Eaton is concerned about conviction that is directly related to the job, you will be given the chance to explain the circumstances surrounding the conviction, provide mitigating evidence, or challenge the accuracy of the background report.
To request disability-related reasonable accommodation to assist you in your job search, application, or interview process, please call us at 1-800-836-6345 to discuss your specific need. Only accommodation requests will be accepted by this phone number.
Eaton’s ES AMER PCS division is currently seeking a Co-op Application Engineer.
The hourly rate for this position is $28.00 per hour.
Please note the salary information shown above is a general guideline only. Salaries are based upon candidate skills, experience, and qualifications, as well as market and business considerations.
What you’ll do:
We make what matters work.
At Eaton, we believe that power, whether it’s electrical, hydraulic, or mechanical power - is a fundamental part of people’s lives. Technology, transportation, energy, and infrastructure—these are things the world relies on every day. That’s why we are dedicated to helping our customers across the world find new ways to manage power more efficiently, safely, and sustainably. And we’re committed to improving people’s lives, the communities where we live and work, and the planet our future generations will depend on. Because that’s what really matters–and we’re here to make sure it works.
While our vision is to improve the quality of life and the environment through the use of power management technologies and services, our culture and what we value can be represented in three essential leadership attributes expected of all Eaton employees.
We Think Big - We take smart risks, lead with curiosity, challenge convention, and innovate with speed.
We Act Boldly - We prioritize what matters most, lead decisively and perform to the highest standards.
We Win Together - We lead with integrity, empower one another, and build trust through courage and inclusion.
About Eaton:
As a power management company with 2025 sales of $27.4 billion, Eaton provides energy-efficient solutions that help our customers effectively manage electrical, hydraulic, and mechanical power more efficiently, safely and sustainably. We have approximately 97,000 employees across the world and sell products to customers in more than 160 countries.
What you’ll do:
The primary function of the Application Engineer Co-op is to provide technical application support to customers, sales and other Bussmann division departments. The Application Engineer Co-op will support more technical and in-depth email inquiries. The Application Engineer Co-op will be viewed as the technical expert on Bussmann series products and their application.
Job Responsibilities
- Provide in-depth technical application support to customers via phone, chat, and email.
- Actively engage in the training of customers and Division personnel.
- Develop and update training materials.
- Act as the technical expert from the factory.
- Provide guidance on NEC, UL, CSA, & IEC requirements for overcurrent and overvoltage protection
Qualifications:
- Working toward a B.S. in Engineering from an accredited institution.
- Minimum overall cumulative GPA of 2.8.
- Eaton will not consider applicants for employment immigration sponsorship or support for this position. This means that Eaton will not support any CPT, OPT, or STEM OPT plans, F-1 to H-1B, H-1B cap registration, O-1, E-3, TN status, I-485 job portability, etc.
- No relocation benefit is offered for this position. The candidate must reside within 50 miles of Ellisville, MO.
Preferred Qualifications:
- Major in Electrical Engineering.
- Two years of coursework completed.
All positions may require participation in video and in-person interviews as part of the hiring process. All candidates will be evaluated based on job-related competencies, and all candidates’ privacy rights and data security will be protected in accordance with applicable laws.
We are committed to ensuring equal employment opportunities for all job applicants and employees. Employment decisions are based upon job-related reasons regardless of an applicant's race, color, religion, sex, sexual orientation, gender identity, age, national origin, disability, marital status, genetic information, protected veteran status, or any other status protected by law.
Eaton believes in second chance employment. Qualified applicants with arrest or conviction history will be considered regardless of their arrest or conviction history, consistent with the Los Angeles County Fair Chance Ordinance, the California Fair Chance Act and other local laws.
You do not need to disclose your conviction history or participate in a background check until a conditional job offer is made to you. After making a conditional offer and running a background check, if Eaton is concerned about conviction that is directly related to the job, you will be given the chance to explain the circumstances surrounding the conviction, provide mitigating evidence, or challenge the accuracy of the background report.
To request disability-related reasonable accommodation to assist you in your job search, application, or interview process, please call us at 1-800-836-6345 to discuss your specific need. Only accommodation requests will be accepted by this phone number.
Application Engineer Internship Market
Who's Hiring
Top Industries Hiring
- Manufacturing
- Electronics & Hardware
- Distribution & Wholesale
Tips for Your Application Engineer Internship Search
Start your search earlier than you think
Large employers recruit summer application engineer interns the preceding fall, often closing cohorts before winter break. Smaller companies and co-op programs post closer to start dates, so new openings appear throughout the year. Check listings in September and October for the biggest structured programs, then revisit regularly for later-posting roles.
Build a technical portfolio before you apply
Hiring teams reviewing application engineer interns expect limited work history, so your projects carry the load. Document two or three complete builds or implementations, note the tools and systems involved, and make the work accessible, linked code repositories, CAD files, or technical writeups give recruiters something real to evaluate before an interview.
Work your campus network alongside direct applications
Campus career fairs surface structured internship programs tied to your university, and professors or career center staff often know which employers recruit from your school before roles post publicly. Apply directly to companies running smaller cohorts at the same time, combining both approaches reaches employers you'd miss focusing on only one channel.
Practice the actual application engineer interview format out loud
Application engineer intern screens typically involve technical problem-solving, system or product walkthroughs, and questions about how you've applied engineering concepts in coursework or projects. Practice answering out loud and explaining your reasoning step by step, interviewers weigh how you think through a problem as much as whether you reach the right answer.
Target structured internship programs built for new engineers
Many larger companies run dedicated application engineer cohort or rotational programs designed to train candidates new to the field. These programs offer structured mentorship and defined project tracks, but they recruit early and fill fast. Identify the ones that fit your background and apply in the first wave rather than waiting for general openings.
Set your work-type filter before you start searching
On-site roles are 67% of the application engineer internships listed here. Decide what you can actually commit to, on-site, hybrid, or remote, before you start sorting through listings. Filtering by location and work type up front saves time and keeps you focused on roles you can accept.
Application Engineer Internships: Frequently Asked Questions
How do I get an application engineer internship?
Lead with coursework, personal projects, and a portfolio rather than work history, hiring teams expect limited experience at the intern level. For application engineer candidates, a documented technical portfolio showing real implementations gives recruiters something concrete to assess. Combine direct applications with campus career fairs, where recruiters often move faster for students they meet in person.
Can an application engineer internship turn into a full-time job?
Many employers extend return offers to strong interns, but conversion is never guaranteed. What actually drives it for application engineer interns is consistent performance on real project work, available headcount on the team, and how early you signal interest before return-offer decisions are made. Treat the internship as an extended audition, but keep applying to other roles so you're not counting on one outcome.
When should I apply for application engineer internships?
Earlier than most expect. Large employers recruit summer cohorts the preceding fall, often closing applications before the calendar year turns. Smaller companies and co-op programs post closer to their actual start dates, so openings appear year-round. Check listings regularly rather than treating it as a once-a-year cycle.
Are application engineer internships paid?
Most professional application engineer internships in the United States are paid. Compensation varies by company size, industry, and location, and individual listings show it where the employer chooses to disclose it. Unpaid arrangements are uncommon at engineering-focused employers but do appear occasionally at startups and nonprofit organizations.
What should an application engineer internship resume include?
Lead with projects, not work history. Include two or three complete, documented projects that name the tools and technologies used and link to the work, for application engineer candidates, that means linked code repositories, CAD files, technical writeups, or prototype documentation. Add relevant coursework and keep the resume to one page.
Are there remote application engineer internships?
Yes. Remote and hybrid roles make up 33% of the application engineer internship listings here, with the rest on-site. Remote cohorts fill fast, so apply early and filter by work type to see them before they close.
Can international students get application engineer internships?
Yes. F-1 students can intern through CPT while enrolled or through OPT work authorization after finishing a degree, and the employer does not have to file anything for either, so many companies are open to international interns. Confirm your eligibility and timing with your university's international student office before accepting an offer.
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