I haven't done engineering, but I know that at Mount Holyoke you can complete a 3-2 Engineering program with UMass, Dartmouth, or CalTech. Doing a 3-2 program is a completely legitimate way to get an engineering degree and I know of multiple MHC alums who are now successful engineers, so I'd go for it if I were you! Mount Holyoke's chemistry department is one of the most funded small-college science departments in the country and turns out the greatest number of PHd women chemists of any college in the nation, so Mount Holyoke is a great place to be if you're interested in Chemistry! You might want to look at the chemistry department's page: https://www.mtholyoke.edu/acad/chemistry/
You can also click on "Dual-Degree Engineering Program" on the left side bar to learn more about that. I hope that was helpful!