How can I become a certified measurer?
I suspect there is no such thing beyond what any one-desin class has in their by-laws.
I was a Tornado Class measurer and my ticket was
a lesson from the previous measurer and a letter from him to the National Secretary.
I was
appointed a regional J/24 measurer by Rod Johnstone when the boat went O/D in 1978.
John, does USSailing have a measurer program?
I think anyone with sense (that disqualifies a few Catsailors) and a tapemeasure can do it. Oh...and race car scales

There may be a stability test in some of the rules, but if there is, I'm sure you can be taught to do that.
I would propose self-measuring if indeed measuring is deemed appropriate. Corinthians...RIGHT?