CERTIFIED FLIGHT INSTRUCTOR INSTRUMENT (CFII)
In order to provide instrument training for a commercial pilot or airline transport pilot, you will need to add an instrument rating to your flight instructor certificate (CFII).
FAA REQUIREMENTS
Must hold a Commercial Certificate
Must be at least 18 years old
Must be able to read, speak, write, and understand the English language
FAA medical exam is required
Must be a US Citizen or acquire TSA Approval