mid-15c., from Middle French attestation and directly from Latin attestationem (nominative attestatio) an attesting, testimony, noun of action from past participle stem of attestari to prove, confirm (see attest).
Work Environment. Epidemiologists generally work in clean, well-lit offices and laboratories. In addition to hospitals, epidemiologists work in colleges and universities, schools of public health, medical schools, and research and development services firms.
1 Ecologists employed by environmental consulting companies may assess the environmental impacts of clients' projects, and design sustainable practices to minimize negative effects. 2  Researchers and research assistants conduct research in the field and in labs to answer questions how species and their environment interact.