and/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Areas of responsibility span Aerospace Medicine, Biomedical Engineering, Flight Control Operations, Space Radiation analysis, research operations and integration, and Behavioral Health and Performance (e.g., sleep schedule modification for operators; astronaut psychological assessments, in-flight care, and emergency psychological support).