Right now, chemical and biological engineers can work in many of the same areas. That may change as bioengineering develops as a profession, but bioengineers are likely to work closely with chemical engineers for the foreseeable future.
Both chemical and biological engineers are working with:
Novel materials
Food products
Energy sources
Pharmaceuticals
The list is expanding all the time - tomorrow's graduates may find careers in fields that do not even exist today as chemical and biological engineering research continually expands the opportunities.
If you haven’t decided whether you want a career in chemical or biological engineering, take heart - the curricula for chemical engineering and bioengineering are identical for the first three semesters.