Mechanical, Civil & Aerospace Internships in Illinois

59 open mechanical, civil & aerospace internships in illinois from 24 companies, 48 added in the last 7 days. 63% list pay; the median posted rate is $26/hr (middle half: $23–$31/hr). Most openings: Marathon Petroleum (9), AECOM (6), IMEG (6), Caterpillar Inc. (4).1 is remote-friendly.

Updated Oct 19, 2026 from employer career pages · newest posting Oct 15, 2026.