The choice to fire you or temporarily suspend your employment is up to your employer, not the Department of Transportation. The DOT sets protocol in place after a failed drug test, but it is the employer’s discretion to terminate or not. At minimum, the employer must remove you from safety-sensitive job duties. If you have to drive, fly, operate a train, or do anything else that impacts the safety of others, you will not be able to return to those tasks until you complete a SAP program.