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Illinois summer internships
Intern/Co-op - HES&S Environmental (Summer 2027)
Marathon Petroleum - Findlay, OH, United States
Intern/Co-op - Refining Construction Management (Summer 2027)
Marathon Petroleum - Texas City, TX, United States
2026-2027 U.S. Operations Intern/Co-op - Fall Posting
Dow - Plaquemine, LA, United States
Engineering Product Management Specialist II (Intern) - United States
Cisco - North Carolina, United States
Refining Chemical Engineering Intern/Co-op Spring 2027
Marathon Petroleum - San Antonio, TX, United States
Intern/Co-op - Accounting (Summer 2027)
Marathon Petroleum - Denver, CO, United States
Intern/Co-op - Refining Mechanical Engineer (Summer 2027)
Marathon Petroleum - Detroit, MI, United States
2027 Summer Corporate Intern - Engineering
Caterpillar - West Fargo, ND, United States
Returning Intern Planner - Summer 2027 - Great Lakes Division (For Current/Former HNTB Interns Only)
HNTB - Madison, WI, United States
Refining Chemical Engineering Intern/Co-op Spring 2027
Marathon Petroleum - Robinson, IL, United States
Engineering Product Management Specialist II (Intern) - United States
Cisco - Milpitas, CA, United States
Legal Rising 3L (Intern) - United States
Cisco - Atlanta, GA, United States
AI Operations Engineer I (Intern) - United States
Cisco - North Carolina, United States
Structural Engineering Intern | Naperville, IL
IMEG - Chicago, IL, United States
2027 Summer Corporate Intern - Procurement
Caterpillar - Irving, TX, United States
Intern/Co-op - Refining Electrical Engineering (Fall 2027)
Marathon Petroleum - Kentucky, United States
Intern/Co-op - Refining Electrical Engineering (Summer 2027)
Marathon Petroleum - Martinez, CA, United States
Technical Sales Intern - Food & Beverage Market
Solenis - Illinois, United States
Capital Markets Summer 2027 Internship - Century City, LA
JLL - Los Angeles, CA, United States
2027 Summer Corporate Intern - Engineering
Caterpillar - El Reno, OK, United States
