Failure to study homogeneous types of mental disorder, to include adequate status controls, and to provide supporting theoretical and empirical evidence are cited as frequent methodologic errors in studies on occupational mobility and mental disorders. Evidence that schizophrenia is linked to downward mobility is interpreted to be fairly consistent; on the other hand, mild psychiatric disorder seems to be linked to upward mobility. For the present study, a sample of 166 adult male North African Jewish immigrants to Montreal was interviewed using a 22-item scale of psychiatric symptoms indicating impairment developed by T. S. Langner (1963). Results show that present job prestige was positively correlated with upward mobility, and job in Morocco was negatively correlated with mobility. Mobility had a zero correlation with mental health, but the presence of mild psychiatric symptoms was weakly associated with upward mobility. The correlation increased in strength for those who had changed jobs more recently (e.g., for the 21 Ss who had been on the job for less than 1 yr, the correlation was .55). A similar pattern was obtained for a measure of job satisfaction. Results indicate that job stresses involved in upward mobility can lead to mild psychiatric symptoms. (54 ref)