Anyone with the kind of knowledge you're looking for is working as a historical researcher, not a doctor.

She has worked primarily as a researcher and lives in London.

Until then, she was working as a researcher, living a life of comparative peace.

From 1941 to 1944 she worked at Life as a researcher and writer.

He began working for Shell as a researcher in 1933.

He stayed at the institute until 1976, working as a senior researcher and teacher.

He also worked as a full-time researcher between 1984 and 1989.

I have mostly worked as a researcher, writer or teacher.

I have always worked in technical areas as a researcher.

He has worked as a researcher at Greek and foreign institutes.