<p>Healthcare and social service providers working with homeless populations may face unique stressors while performing their jobs, such as working in places not meant for human habitation and in unpredictable environments. While these issues are well-known, there is no formal assessment tool to gauge sense of physical safety among homeless service providers. The current study was conducted to determine the reliability and validity of a self-report assessment that measures feelings of safety at work among healthcare social service providers. The Homeless Assistance Safety Perceptions (HASP) inventory is a 16-item questionnaire that was developed and administered to 1,273 Veterans Affairs (VA) employees of homeless programs across all VA catchment regions. Preliminary assessments found that the HASP inventory has good internal consistency and content validity although further evaluation is needed. To our knowledge, this measure is the first instrument validated to measure perceptions of workplace safety among providers working with homeless populations.</p>