Very recently I involved into a discussion about using "work" in the meaning "to work in some field of scientific research". The phrase in question was "He works on bugs" followed by names of their biological classification categories (a formal text, a researcher's bio) proposed by a qualified editor, a native speaker. It sounds rather casual to me. Would it sound all right to you, or should I have insisted on "He investigates bugs" / He is involved in the investigation/research of bugs", etc.? Thank you.