Sealed Air Corporation Internships are open to outstanding college students who are currently enrolled at an accredited college or university in the U.S. Positions are offered in many diverse areas. Most internships occur during the summer, but some interns may receive extended offers for future internships with the company. Applicants must have a GPA of 3.0 or above. Internships are offered in Research & Development, Marketing and Communications, Graphic Design, Human Resources, Finance, Information Systems, Manufacturing, Customer Service, Sales, and Packaging.