Translation of "A researcher" in German

But don't you think that the life a mathematical researcher is an easy one.
Aber glauben Sie nicht, das Leben eines mathematischen Forschers sei einfach.
TED2020 v1

He then became a researcher in the UK.
Danach wurde er Forscher in England.
Wikipedia v1.0

He was also once a researcher at the Japan Atomic Energy Research Institute.
Er war auch Forscher am Japan Atomic Energy Research Institute.
Wikipedia v1.0

He is a researcher at the Center for Communications Research, La Jolla, and lives nearby in San Diego.
Er ist Forscher am Center for Communications Research in La Jolla.
Wikipedia v1.0