Summer 2025 Mars Wrigley Research and Development Internship (On-Campus)

Here at Mars, we work together for the world we want tomorrow, for people, pets and our planet. From being a socially responsible business, to investing in our Associates to help them be their best selves - we're always looking at how we can make tomorrow brighter.

As an Associate, the paths you choose, the relationships you build, and the opportunities you make, are all made by you. You have the freedom and ownership to create your own Mars career journey with tons of support and development along the way. We’re always seeking to transform today’s talent into the leaders and technical experts of tomorrow – start your journey at Mars today.

Mars offers a few Research and Development Internship Positions. Below are their respective job descriptions.

Mars Wrigley R&D Factory Innovation Internship Experience

Locations in: Cleveland, TN & Elizabethtown, PA

As a Mars Wrigley R&D Factory Innovation Intern, you will gain exposure to the following areas:

• Product, process, and packaging development
• Site Manufacturing and Engineering Teams
• Compliance functions including quality & food safety or scientific and regulatory affairs.
• Sensory
• Work with a Line Manager who will serve as your day-to-day, on-site mentor to provide guidance throughout the experience. 

Mars Wrigley Research and Development Internship Experience

Locations in: Chicago, IL & Hackettstown, NJ

As a Mars Wrigley Research and Development Intern, you will gain exposure to the following areas:

• Compliance functions including quality & food safety or scientific and regulatory affairs
• Product, process, or packaging development
• Science & Technology
• Compliance functions including quality & food safety or scientific and regulatory affairs
• Sensory
• Work with a Functional Lead who will serve as your day-to-day, on-site mentor to provide guidance throughout the experience.

We are looking for Students who are:

• Proactive, curious, and passionate with a strong drive for results, a hunger to learn and an eagerness to quickly build relationships across the organization enabling them to support our R&D day-to-day operations.
• Enthusiastic about our iconic brands, research, innovation, and the consumer products industry
• Pursuing degrees in Chemical/Mechanical/Biological Engineering, Food Science, Data Science, Environmental Science, Biological Systems, Packaging or Chemical Engineering or other related engineering disciplines
• Excited about leveraging data to make decisions that drive efficiency
• Eligible candidates will intern the summer prior to their final graduation date (typically rising seniors) or the summer prior to their junior year (rising juniors). Open to students legally authorized to work in the U.S. without the need for current or future work status authorization or visa sponsorship for employment. 
• We leverage our internship program to feed our Regional R&D Teams post-graduation and build our talent pipeline for future technical and people leaders. Our successful interns will receive full-time offers to start their career with Mars!
• Some of the internship positions available might be located at a facility that process nuts or allows dogs and cats on site. Please let us know if this raises any concerns so that we can address them.
• Employment is contingent upon successful completion of drug & background screening. 

What can you expect from Mars?

• Work with over 140,000 diverse and talented Associates, all guided by The Five Principles.
• Join a purpose driven company, where we’re striving to build the world we want tomorrow, today.
• The Mars Internship Experience is a 10–12-week summer program providing excellent depth of experience with real world business problems and opportunities.
• Exciting professional and social engagement activities throughout the experience that provide opportunities to network with your intern peers all the way up to senior leaders.
• Ongoing coaching and mentorship to help you succeed and get the most out of your experience.
• A hybrid work model that simultaneously celebrates the benefits of focusing remotely and the connection & co-creation that happens when we work together in person.
• Best-in-class learning and development support from day one, including access to our in-house Mars University.
• Some of the perks you will receive are an industry competitive salary & benefits packages, fun freebies, and pet-friendly offices.

About Mars:

Mars is a family-owned business with more than $35 billion in global sales. We produce some of the world’s best-loved brands: M&M’S®, SNICKERS®, TWIX®, MILKY WAY®, DOVE®, PEDIGREE®, ROYAL CANIN®, WHISKAS®, EXTRA®, ORBIT®, 5™, SKITTLES®, BEN’S ORIGINAL® and COCOAVIA®. Alongside our consumer brands, we proudly take care of half of the world’s pets through our nutrition, health and services businesses such as Banfield Pet Hospitals™, BluePearl®, Linnaeus, AniCura, VCA™ and Pet Partners™. Headquartered in McLean, VA, Mars operates in more than 80 countries. Our Five Principles – Quality, Responsibility, Mutuality, Efficiency and Freedom – inspire our 140,000 Associates into taking action every day towards creating the world we want tomorrow.

Mars is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law. If you need assistance or an accommodation during the application process because of a disability, it is available upon request. The company is pleased to provide such assistance, and no applicant will be penalized as a result of such a request.