The world is your oyster. You can work in a variety of industries, including biotechnology, life sciences, pharmaceutical, marine, biodefense, food (e.g., as a QA tester), environmental (e.g., EPA), agriculture, consumer goods, ect. This is actually a good question. I had no idea of the breadth of industries available to me with a microbiology degree. To get an idea of the types of jobs you could enter "biology degree" into a popular job board site (e.g., Monster.com, Indeed.com, Linkedin.com) and view the job postings requiring this degree.