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.
Please read About These Lists for more
information.
Derry Mac Mahon in Scientology's Published Service Completion Lists
The following 25 individual completions for Derry Mac Mahon appear in official Scientology publications:
| Derry MacMahon | HAVINGNESS RUNDOWN | Source 113 | 1998-01-01 |
| Derry MacMahon | PROFESSION INTENSIVE | Source 113 | 1998-01-01 |
| Derry Mac Mahon | ABILITY CONGRESS COURSE | Freewinds 39 | 2000-08-01 |
| Derry Mac Mahon | HUBBARD QUALIFIED SCIENTOLOGIST COURSE | Auditor 299 | 2002-03-01 |
| Derry MacMahon | SOLO CERTAINTY COURSE | Advance 158 | 2002-04-01 |
| Derry MacMahon | OT 1 (63 | Advance 159 | 2002-07-01 |
| Derry MacMahon | OT II | Advance 159 | 2002-07-01 |
| Derry MacMahon | OT III | Advance 159 | 2002-07-01 |
| Derry MacMahon | OT IV | Advance 159 | 2002-07-01 |
| Derry MacMahon | OT V | Advance 159 | 2002-07-01 |
| Derry McMahon | THE OT DOCTORATE COURSE | Advance 167 | 2003-09-01 |
| Derry McMahon | EXTERIORIZATION AND THE PHENOMENA OF SPACE COURSE | Advance 174 | 2004-07-01 |
| Derry MacMahon | SCIENTOLOGY ETHICS SPECIALIST COURSE | Celebrity 382 | 2007-05-01 |
| Derry MacMahon | DIANETICS & THE DIANETICS LECTURES AND DEMONSTRATIONS COURSE | Celebrity 386 | 2007-11-01 |
| Derry Mac Mahon | SCIENCE OF SURVIVAL & THE SCIENCE OF SURVIVAL LECTURES COURSE | Celebrity 390 | 2008-06-01 |
| Derry Mac Mahon | SELF ANALYSIS COURSE | Celebrity 392 | 2008-09-01 |
| Derry Mac Mahon | ADVANCED PROCEDURE AND AXIOMS & THOUGHT, EMOTION AND EFFORT COURSE | Celebrity 394 | 2009-02-01 |
| Derry Mac Mahon | HANDBOOK FOR PRECLEARS & THE LIFE CONTINUUM COURSE | Celebrity 394 | 2009-02-01 |
| Derry Mac Mahon | SCIENTOLOGY: MILESTONE ONE COURSE | Celebrity 394 | 2009-02-01 |
| Derry Mac Mahon | THE ROUTE TO INFINITY COURSE | Celebrity 396 | 2009-10-01 |
| Derry Mac Mahon | SCIENTOLOGY: A HISTORY OF MAN & TECHNIQUE 88 COURSE | Celebrity 396 | 2009-10-01 |
| Derry Mac Mahon | THE PHILADELPHIA DOCTORATE COURSE | Celebrity 398 | 2010-04-01 |
| Derry MacMahon | THE FACTORS: ADMIRATION AND THE RENAISSANCE OF BEINGNESS COURSE | Celebrity 400 | 2010-11-01 |
| Derry MacMahon | DIANETICS: THE ORIGINAL THESIS COURSE | Celebrity 400 | 2010-11-01 |
| Derry MacMahon | DIANETICS: THE EVOLUTION OF A SCIENCE COURSE | Celebrity 400 | 2010-11-01 |
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.
Derry Mac Mahon in Scientology's Publications
No entries were found in my main Scientology Statistics database for this person.
Derry Mac Mahon and the Clear List
No entries were found in my Scientology Statistics Project Clear List database for this person.
Derry Mac Mahon and Scientologist Online Sites
My database does not list a Scientologist Online cookie-cutter web site for this person.
Derry Mac Mahon 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 kristi@truthaboutscientology.com.