A researcher or research staff member who works at an institute, university, or company's research division, often conducting experiments, investigations, and publishing papers.
彼はその大学の研究員として新しい材料の研究をしている。
He is working as a researcher at that university, studying new materials.
研究員の仕事は実験の計画とデータ解析が中心だ。
A researcher's work mainly consists of planning experiments and analyzing data.
新しい研究員がラボに配属された。
A new researcher was assigned to the lab.