All types of engineering are going to need at least 4 semesters for calc. A lot of students have trouble getting through engineering (or any type) in 4 years… even when starting with Calc1.
@sattut - You son’s best advise will come from his advisor on campus. In this big group group we have an assortment of kids who have studied a variety of majors . If you tell us a bit of about his strengths and interests, perhaps we can add some thoughts too.