Jos Koster - Scientology Service Completions

Note: Preliminary analysis suggests that about 60% of people who try Scientology do only a single course or service, that 80% of new members become inactive within 2 years, and that 65% of those who reach the level of Clear become inactive within a year after doing so. The older a list, the more likely that a person listed on it is no longer involved in Scientology.
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Jos Koster in Scientology's Published Service Completion Lists

The following 7 individual completions for Jos Koster appear in official Scientology publications:

Jos KosterSTATE OF MAN CONGRESS COURSE Freewinds 331999-06-01
Jos KosterSCIENCE OF SURVIVAL COURSE Freewinds 902012-06-01
Jos KosterTHE WAY TO HAPPINESS COURSE Freewinds 902012-06-01
Jos KosterSUCCESS CONGRESS COURSE Freewinds 1092015-07-01
Jos KosterPOWER® PROCESSING Advance UK 50 42018-09-01
Jos KosterPOWER PLUS® PROCESSING Advance UK 50 42018-09-01

Note: The dates listed above are the approximate publication dates of the magazines, which may be weeks or months later than the actual date the service was completed.

Jos Koster in Scientology's Publications

No entries were found in my main Scientology Statistics database for this person.

Jos Koster and the Clear List

No entries were found in my Scientology Statistics Project Clear List database for this person.

Jos Koster and Scientologist Online Sites

Jos Koster had a Scientologist Online cookie-cutter web site.

The link was:

Note: The individual cookie-cutter websites have been taken down, and those links now redirect to the main Scientology site.

search for Jos Koster, Scientologist

Jos Koster and WISE Directories

WISE, the World Institute of Scientology Enterprises, publishes directories listing their members.

My database does not list this person in the WISE directories in my archives.

The information on this page comes from my Scientology Statistics database. While I attempt to be as accurate as possible, errors or inaccuracies may be introduced by the source material, the transcription process, or database bugs. If you discover an error or problem, please let me know by writing to