Where I work we have everything from pure science to pure engineering and it's definitely a continuum. Sometimes it's painful to be caught in the middle but I think that's really where the interesting engineering happens.

However, there are also some forms of engineering that are not very science based, you get a process or product to work and you don't exactly know why. You can still use scientific methods to get to a safer, more controlled process but don't necessary exactly know why something works. We call that "taking the art out of engineering" and it's an important part, especially in large scale manufacturing.