Biotechnology is a very vast field of applied biological science.
It deals with the study of advantage of using biological processes and living organisms in Engineering & Technology, Medicine and various other fields.
Here I am listing some of the biotechnology field and some job profiles:
Candidates can choose for a career in the following:

Medical Biotechnology
Medical Nanotechnology
Industrial Biotechnology
Neurosciences
Marine Biotechnology
Agriculture Biotechnology
Microbiology
Mechanobiology
Pharmacogenomics

Some job profiles are as follows:

Lab technician
Research Associate
Business Development Officer
Marketing personnel, Biotech Engineer
Database and Information manager
Database and Information Administrator