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Perhaps they mean literally 5-8 years standing in a field killing rats in said field. Because then you'd be outstanding in your field.

Very good.

Do you have to be out standing in your field, or is it okay if you're laid back?

Pest/rodent control? Definitely a field. Although I suspect they are meaning public administration here.

Alberta, Canada maintains a team of dedicated rat exterminators paid for by the province. Along with a near genocidal government policy towards rats.

Animal/pest control is

well, yes. pest and rodent removal and such.