Final answer:
A personality psychologist is most likely to be interested in what factors make an employee best suited for a given job.
Step-by-step explanation:
The researcher interested in what factors make an employee best suited for a given job would most likely identify as a(n) personality psychologist. Personality psychology focuses on studying individual differences in personality traits and their influence on behavior and performance in various contexts, including the workplace. These psychologists conduct research to understand how personality traits and characteristics can predict job performance and success, and they develop assessments and tools to measure individuals' personality.