Greg Feith is an American former Senior Air Safety Investigator with the National Transportation Safety Board. He currently works as a consultant on aviation safety and security matters in the private sector, and as the aviation expert for NBC and MSNBC. He also serves as the technical advisor in a number of television programs such as Mayday (also known as Air Disasters in the United States and Air Crash Investigation in other parts of the world), Seconds from Disaster, and Why Planes Crash while maintaining a busy speaking schedule.