Summer 2026 Mars Wrigley Research and Development Internship - Chicago, IL or Hackettstown, NJ

Job Description:

At Mars, we work together to build a better world for people, pets, and the planet. From being a socially responsible business, to investing in our Associates, we're always looking at how we can make tomorrow brighter. 

As an Associate, you are empowered with the freedom and tools to be yourself, to forge your own path, to build relationships across our global community, to discover the right opportunities for you to grow – all with ample support. Here, you have our ongoing commitment to your growth and development as you work across our world-famous brands.  

Start your journey at Mars today! 

Mars Wrigley Research and Development Internship Experience 

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 

• Sensory 

• Work with a Functional Lead who will serve as your day-to-day, on-site mentor to provide guidance throughout the experience. 

What we’re looking for: 

• 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 strategic R&D strategies 

• Enthusiastic about our iconic brands, research, innovation, and the consumer products industry 

• Pursuing degrees in Food Science, Environmental Science, Biological Systems, Packaging or Chemical Engineering.  

• 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 – May 2027 Graduation) or the summer prior to their junior year (rising juniors – May 2028 Graduation). 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 intern program to feed our R&D Rotational Program post-graduation and build our talent pipeline for future technical and people leaders. Some of our successful interns may receive full-time offers to start their career with Mars! 

• Some of the internship positions available might be located at a facility that processes 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. 

• Eligible candidates will be responsible for personal transportation to and from work site during duration of the internship program.  

What can you expect from Mars? 

• The Mars Internship Experience is a 10–11-week summer program providing excellent depth of experience with real 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.