The United States Environmental Protection Agency is a place that holds jobs in the area of Microbiology. These jobs are in the Microbiological and Chemical Exposure Assessment Research Division. This division consists of three branches and the one that with microbial professions would be the Microbial Exposure Research Branch.
This branch does research to characterize and name new pathogens in bioaerosols and in water environments. They also purify microbial toxins, allergens and other products. With these products they design ways to rate the levels of these toxins in air indoors and in water sources. They also design cultural and molecular gene probes to find and measure toxic microorganisms in the environment.
Things developed in the past include DNA fingerprinting to compare environmental organisms with humans. They also developed serological ways to gauge exposures to microorganisms and their products. This branch also does studies with humans to monitor their exposure to toxic microbes.
In addition to microbiologists the Microbial and Chemical Exposure Assessment research Division has jobs for bacteriologists, virologists, parasitologists, immunologists, and molecular biologists. One of the EPA, research organizations is located in Cincinnati, Ohio. Jessica Kosko
http://www.epa.gov/nerlcwww/index.html
http://www.epa.gov/nerlcwww/mceard.htm