JobsMercury Marine

Mercury Marine: Intern Engine and Vessel Calibration Group

Mercury Marine · Fond du Lac, WI

Posted Sep 9, 2026 · We last checked this listing on Sep 20, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

Behavioral

Tell me about a class project or personal project where you worked with an internal combustion engine or some kind of mechanical system. What was your role in it?

whether hands-on mechanical exposure is real and specific, not just coursework listed on a resume

Describe a time you had to explain a technical concept to someone who didn't have your background.

ability to communicate clearly with non-specialists, which the posting explicitly calls out as required

Tell me about a time you were given a task with only general direction and had to figure out most of it yourself.

capacity to work under general supervision, which is explicitly required since this isn't a hand-held internship

What interests you about propulsion and vessel calibration specifically, as opposed to another area of mechanical engineering?

genuine motivation and whether the applicant understands what this specific group does versus applying broadly

Do you have any boating, fishing, or general marine experience? Tell me about it.

real-world familiarity with the product and end-use environment, which the posting lists as a plus

Tell me about a group project that didn't go smoothly. What happened and what did you do about it?

teamwork and conflict handling since the role explicitly involves supporting a product development cycle as part of a team

Technical

Walk me through how you would approach calibrating an engine for both power and fuel economy, knowing those two goals often pull in opposite directions.

basic understanding of calibration tradeoffs and whether the candidate grasps that engine tuning is a balancing act, not a single optimization

Have you used Python, MATLAB, or a similar tool to analyze a set of data? Tell me about the biggest dataset you've worked with and what you were trying to pull out of it.

actual coding and data analysis fluency versus just listing a language on a resume

What do you know about how an embedded control system talks to an engine, at a basic level, sensors, actuators, that kind of thing?

baseline familiarity with embedded controls concepts even without direct job experience

Imagine you're testing an electrified propulsion system and the data shows inconsistent results between runs that should be identical. What would you check first?

systematic troubleshooting instinct and understanding that repeatability issues usually trace back to test setup or controls

Situational

Say you're given a dataset from an engine dyno test and asked to find out why part throttle combustion stability dropped compared to the last run. How would you start digging into it?

structured problem-solving approach and comfort translating raw data into a diagnosis

If you noticed a calibration change one of the engineers made seemed to hurt emissions performance, but you weren't totally sure, what would you do?

judgment about speaking up appropriately as an intern without overstepping or staying silent

How do you usually organize your work when you have several small assignments going at once, since interns here often handle a mix of bigger project support and smaller individual tasks?

time management and prioritization skills appropriate for a full-time 40 hour internship with varied task sizes

Practice this interview out loud.

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The full job description

As published by Mercury Marine.

Are you ready for what’s next?   Come explore opportunities within Brunswick, a global marine leader committed to challenging conventions and innovating next-generation technologies that transform experiences on the water and beyond.  Brunswick believes “Next Never Rests™,” and we offer a variety of exciting careers and growth opportunities within united teams defining the future of marine recreation.  Mercury Marine- Fond Du Lac, WI- Mercury Marine: Engine and Vessel Calibration Internship Location: Plant 12- Fond Du Lac, WI Workplace Category: On site Travel Required: No Direct Reports: No Pay Range:  $18.00-27.50 Visa Sponsorship: Applicants must be currently authorized to work in the United States.  This position is not eligible for employment visa sponsorship now or in the future.   Relocation: Yes Innovation is the heart of Brunswick.  See how your contributions will help transform vision into reality: Position Overview :  The engine and vessel calibration group at Mercury Marine is looking for individuals with a strong interest in propulsion and vessel calibration. This role will help students develop a system level understanding of problem solving along with developing skills with embedded control systems and internal combustion engine calibration processes. Essential Functions:   • Assist engineers in development of base engine hardware and calibrations for power, emissions, fuel economy, and part throttle combustion stability • Assist engineers with electrified propulsion calibration and system development • Assist engineers with vessel control calibration and system development. • In addition to a great hands-on learning experience, you will also acquire the skills needed to work in a team environment supporting all aspects of the product development cycle from concept to production. Diversity of thought and experiences is fundamental when imagining the unimaginable. Certain skillsets/experiences are necessary; however, others can be developed along the way. Required Qualifications:    • Current enrollment in a BS program with a major in Mechanical Engineering or similar, Minimum second semester sophomore status with 48 completed credits • Availability to work full-time (40 or more hours per week) through the full term • Ability to define problems, collect data, establish facts, and draw conclusions. • Strong mechanical aptitude (engine knowledge is a plus) and creative ability; self-motivated; ability to work under general supervision • Ability to convey technical concepts in an easily understood manner, both verbally and in writing, requiring clear and concise verbal and written communications. • Dependable, self-motivated, and engaged learner   Preferred Qualifications:   • Boating, fishing and/or marine experience is beneficial. • Experience with coding languages, Python/Matlab or similar • Experience with data analysis tools Working Conditions: • Learning Opportunities: Our Student Program is designed to provide hands-on experience in a professional setting. You will work alongside experienced professionals and get a chance to apply your academic knowledge to real-world tasks.  • Project Work: The work environment is supportive, collaborative, and conducive to learning. Student co-ops or interns typically work on specific projects or tasks that contribute to the organization’s goals. This may range from supporting larger projects to handling smaller, individual assignments.   • Hours: Co-ops and Interns are expected to work a full 40-hour work week • Feedback and Performance Reviews: As a co-op or intern, you will receive feedback and performance reviews throughout your assignment. We value the importance for interns to understand their progress and areas for improvement.  The pay range for this position is $18.00 – 27.50 per hour.  The actual hourly rate offered will vary depending on multiple factors including year in school/credits earned, degree, job-related knowledge/skills, relevant experience, business needs, and geographic location.  Compensation decisions are dependent upon the specifics of the candidate’s qualifications and the business context. Why Brunswick:   Whatever tomorrow brings, we’ll be at the leading edge.  As the clear leader in the marine industry, we’re committed to our values and supporting our exceptional people. We offer and encourage growth opportunities within and across our many brands. In addition, we’re proud of being recognized for making a splash with numerous awards !  About Mercury Marine Headquartered in Fond du Lac, Wisconsin, Mercury Marine® is the world’s leading manufacturer of recreational marine propulsion engines. A division of Brunswick Corporation (NYSE: BC), Mercury provides engines, boats, services and parts for recreational, commercial and government marine applications. Mercury empowers boaters with products that are easy to use, extremely reliable and backed by the most dedicated customer support in the world. The company’s industry-leading brand portfolio includes Mercury outboard engines, Mercury MerCruiser® sterndrive and inboard packages, Mercury propellers, Mercury inflatable boats, Mercury SmartCraft® electronics, Land 'N' Sea marine parts distribution and Mercury and Quicksilver® parts and oils. More information is available at MercuryMarine.com. Next is Now!   We value growth and development, recognizing that people come with a wealth of experience and talent beyond just the technical requirements of a job. If your experience is close to what you see listed here, please still consider applying. Brunswick is an Equal Opportunity Employer and considers all qualified applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status or any other characteristic protected by federal, state, or local law.  Diversity of experience and skills combined with passion is key to innovation and inspiration and we encourage individuals from all backgrounds to apply.  If you require accommodation during the application or interview process, please contact hrsharedservices@brunswick.com  for support.  Brunswick and Workday Privacy Policies Brunswick does not accept applications, inquiries or solicitations from unapproved staffing agencies or vendors. For help, please contact our support team at: hrsharedservices@brunswick.com or 866-278-6942. All job offers will come to you via the candidate portal you create when applying through a posted position through https:///www.brunswick.com/careers .  If you are ever unsure about what is being required of you during the application process or its source, please contact HR Shared Services at 866-278-6942 or HRSharedServices@brunswick.com . #Brunswick Corporation - Mercury Marine For more information about EEO laws, - click here Brunswick Corporation participates in E-Verify as part of our commitment to a lawful and transparent hiring process. For additional information click here: https://www.brunswick.com/e-verify .

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