Thanks for the replies.
Its interesting that the Dutch CAA in their published
FAQ's for Examiners question 31, specifically give requirements.
31. (MPA) What are the experience requirements to become a Senior TRE?
Within the last 5 years the examiner must have worked at least 3 years as a TRE and have given a minimum of 1000 hrs of instruction as TRI. He must have an ATPL and 1500 hrs as PIC on the category of aircraft for which he will be a Senior TRE.
I wonder where they got these figures specifically the hour requirements from.?