The selected candidate must pass an extensive background investigation, including criminal history, credit check, drugscreening, medical clearance, psychological evaluation, polygraph, fingerprinting, professional reference check, and othersecurity vetting, and maintain all required clearances as condition of employment. Background Process: The selected candidate must pass an extensive background investigation, including criminal history, credit check, drug screening, medical clearance, psychological evaluation, polygraph, fingerprinting, professional reference check, and other security vetting and maintain all required clearances as condition of employment.