A wide range of social science, psychology, and welfare services positions fall under the federal job category GS-0100, which is essential to departments like the VA, HHS, DOJ, and DOD. Positions that contribute to research, policy development, mental health care, and public welfare administration include clinical psychologists, social scientists, intelligence analysts, and social workers. These psychologists may provide evaluations, therapy, and program supervision in outpatient settings, assisted living facilities, or federal research institutes. Usually, applicants must have a degree in the social or behavioral sciences or comparable experience in order to be eligible. These positions are essential for developing evidence-based practices in social policy and mental health, helping vulnerable groups, and forming public programs.