Which approach for fitness-for-duty evaluations is recommended by the International Association for Chiefs of Police? A psychologist can perform the fitness-for-duty evaluation, but a psychiatrist must provide the needed treatment. Psychiatrists (not psychologists) must perform both the fitness-for-duty evaluation and provide the needed treatment. The psychologist who performs the fitness-for-duty evaluation also provides the needed treatment. The psychologist who performs the fitness-for-duty evaluation does not provide any treatment (an additional mental health professional provides the treatment).