Employers regulated by the following DOT agencies are required to send applicants and employees for DOT drug tests. The following safety-sensitive employees and applicants for these positions must take DOT drug tests: - Air traffic controllers - Aircraft dispatchers - Airline flight crew members - Airline pilots - Bus drivers - Commercial truck drivers - Flight attendants - Flight instructors - Flight operations control specialists - Pipeline/hazardous materials emergency responders - Pipeline/hazardous materials maintenance workers - Pipeline/hazardous materials operators - Train conductors - Train dispatchers - Train engineers - Train operators - Train signalmen - Train utility employees - U.S. Coast Guard service members