I know it was mentioned up top but Northeastern offers a very good engineering program and the D’Amore Kim school of business has an undergrad entrepreneurship and innovation concentration. Combined with the chance to co-op and you have a pretty solid program. I have a son there now studying dual major of MIS/Supply Chain and he is active in the entrepreneur club on campus.
Babson is a great undergrad biz school for entrepreneurship, but no engineering. It’ also small and not located in a city. Olin College shares a campus but is teeny and very hard to get accepted to.
Your son might also like a tech school like RPI that has a business program, their tech departments work closely with the biz school. . My son liked it there too, but ended up at NEU.
Good luck.