Psychological theories about human motivation and accommodation to environment can be used to achieve a better understanding of the human factors that function in the work environment. Maslow's theory of human motivational behavior provided a theoretical framework for an empirically-derived method to predict job satisfaction and explore the hypothesis that, in the work environment, degrees of self-assessed job satisfactions vary with the strength of psychological needs satisfied. Federal government workers (N=472) in 29 different jobs completed a questionnaire designed to estimate job satisfaction from measures of need satisfaction. Results identified the strongest psychological needs as interesting duties, job security, and self-actualization, thereby lending support to the hypothesis. The findings suggest that this knowledge may be helpful for vocational counselors and employment-placement specialists. (The "Jobs and Attitudes Survey" instrument is included in the document.) (KMF)