<p>couple of other thoughts....</p>
<p>Biotech is certainly a field that can utilize biology and engineering backgrounds. Suggest you peruse some biotech department web sites, like this one from Penn:
<a href="http://www.upenn.edu/biotech/index.html%5B/url%5D">http://www.upenn.edu/biotech/index.html</a></p>
<p>I agree with the posts that suggest getting a job for a year or 2 in an engineering firm, then continuing your education. We happily pay for employees to get their master's degrees, and we have put numerous employees w/ non-engineering undergrad degrees (e.g., biology) thru environmental engineering masters programs. Its hard work, but these folks know better what they want out if a career by doing it this way.</p>
<p>If you want to apply the knowledge acquired in your biology major environmental, chemical or the emerging field of biotech engineering would be logical choices.</p>
<p>In the field of environmental engineering wastewater treatment is highly dependent on biological processes such a activated sludge processes, sludge digestion etc. Likewise, hazardous waste treatment sometimes requires a working knowledge of biological processes such as anaerobic bioreactors. And of course all disinfection processes have a bioorganism component. Many environmental models and essentially all models involving a dissolved oxygen component have a biologic component which must be factored into the mathematical system model.</p>
<p>ChemEng, of which I have little direct knowledge often employs bioreactors to process and produce specific chemical compounds.</p>
<p>I suspect that if you choose to enter into an engineering major, many of the credits you have will not be applicable toward the engineering degree. You will have to take additional math thru diff eq's, physics, engineering analysis, strength of materials, dynamics, etc and other such prereqs.</p>
<p>Good luck!</p>