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Illinois summer internships
Intern/Co-op - Refining Construction Management (Summer 2027)
Marathon Petroleum - Mandan, ND, United States
Intern/Co-op - Accounting (Summer 2027)
Marathon Petroleum - San Antonio, TX, United States
Intern/Co-op - Refining Mechanical Engineer (Spring 2027)
Marathon Petroleum - Martinez, CA, United States
Supply Chain Intern - Engineering and Business Majors
Ecolab - Joliet, IL, United States
Intern/Co-op - Refining Mechanical Engineer (Summer 2027)
Marathon Petroleum - El Paso, TX, United States
2027 Summer Corporate Intern - Engineering
Caterpillar - South Milwaukee, WI, United States
Returning Project Controls Intern - Summer 2027 - Great Lakes Division (For Current/Former HNTB Interns Only)
HNTB - Columbus, OH, United States
2027 Summer Corporate Intern - Engineering
Caterpillar - Fort Worth, TX, United States
Refining Chemical Engineering Intern/Co-op Spring 2027
Marathon Petroleum - Robinson, IL, United States
Intern/Co-op - Refining Chemical Engineering Fall 2026
Marathon Petroleum - Dickinson, ND, United States
Intern/Co-op - Refining Electrical Engineering (Summer 2027)
Marathon Petroleum - Mandan, ND, United States
Returning Intern Engineer - Summer 2027 - Great Lakes Division (For Current/Former HNTB Interns Only)
HNTB - Indianapolis, IN, United States
Intern/Co-Op - Supply Chain (Summer 2027)
Marathon Petroleum - Kentucky, United States
Intern/Co-op - Refining Chemical Engineering Fall 2026
Marathon Petroleum - Canonsburg, PA, United States
Research and Development Engineering Intern
Ecolab - Naperville, IL, United States
Intern/Co-op - Refining Electrical Engineering (Fall 2027)
Marathon Petroleum - Robinson, IL, United States
Intern/Co-op - Refining Chemical Engineering Fall 2026
Marathon Petroleum - Minnesota, United States
Returning Intern Engineer - Summer 2027 - Great Lakes Division (For Current/Former HNTB Interns Only)
HNTB - Milwaukee, WI, United States
Sales Internship Program
Ferguson - Oak Brook, IL, United States
Intern/Co-op - Accounting (Summer 2027)
Marathon Petroleum - Wilmington, CA, United States
