The Department of Veterans Affairs performs pre-employment reference checks as an assessment method used in the hiring process to verify information provided by a candidate (e.g., on resume or during interview or hiring process); gain additional knowledge regarding a candidates abilities; and assist a hiring manager with making a final selection for a position. In addition to meeting the KSAs for GS-9 grade level, the candidate must demonstrate all of the KSAs below: Knowledge of human development throughout the lifespan, interventions based on research and family systems theory and therapy, formal diagnostic criteria, risk assessment, evidence-based practice and assessment tools.