I personally do not think the endorsement is based on Job Titles. "Job Titles" are one of those subjective items, and vary from organisation to organisation (at least that has been my experience).
I would be more concerned that my endorser can truly validate your experience.
From the (ISC)2 site:
https://www.isc2.org/endorsement
It asks for experience along with work experience.
Maybe one of the folks from (ISC)2 can be more specific? @tldutton ? can you assist?
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The endorsement process is based on your stated responsibilities, not your job title since a job title does not mean the same thing across multiple organizations.