The co-op program at Purdue is run through the Office of Professional Practice (OPP). Here’s the link to their webpage: https://opp.purdue.edu/programs/index.html
Here’s the list of the companies that hire co-op students:
https://opp.purdue.edu/employers/employers-list.html
I’m sure the OPP would be happy to answer your questions and give you more information!
Here’s the contact information:
Office of Professional Practice
Potter Engineering Center, Rm. 114
500 Central Drive
West Lafayette, IN 47907
Phone: (765) 494-7430
Email: propractice@purdue.edu
Good luck in making your decision!