MaryMac Books


For more than 30 years ITD has been Australia’s leading training organization using Jung’s theory of Psychological Types and related instruments, including the MajorsPTITM and the Myers-Briggs Type Indicator (MBTI®) instrument.  We continue to provide high quality training and certification in psychological type theory and the application of type theory.

Please contact Mary McGuiness on 0417661104  if you have any questions.

Online Books


Ideal resource for introducing clients to type.     

Packed with information, including two pages 

about each type!    

RRP $13. Bulk discounts available. 

Written and published in Australia.


2021  Covid-19                                                                       

Due to social distancing recommendations during the covid-19 

pandemic ITD has temporarily suspended face to face workshops 

and certification programs. We hope to resume these later in 2021.

For now we are offering some VIRTUAL training and seminars.

In-house VIRTUAL training and consultations are also available.


Majors Personality Type Inventory Certification Program

Become certified to purchase and use this amazing instrument.

Next programs:  
(1) February 16, 17, 22, 23 and 24.
(2) April 6, 7, 13, 20 and 27  (Note the date change)
(3) June 21-23 and 28-29
Times: 9.15am to 1.30pm on each day


MajorsPT- Elements  (Step II)  Certification Program

Dates: (1) March 29-30        (2) July 6-7
Times: 9.15am to 1.30pm on both days

To REGISTER ....Call  ITD  on 0417661104  or  EMAIL                                                                                           




Check course details

for new

VIRTUAL training

in 2021

starting February, 2021


Contact ITD for details:




 Registration Form

 Book Order Form