Actual time spent by Master Graham Healy as an apprentice to various Masters.
7 years Boxing training( coached by His Father Bert Healy Qld State Champ) (Plus boxing coaching others 30 years ),
7 years under Grandmaster Chong Chul Rhee ,(Tae Kwon Do)  
Initially 7 years with Grandmaster Young ku Yun (ITF/YJD) , then 1993-2017 developing my own style 24 years, in 2000 Master Healy  Founded the International Self-Defence association ISDA  which continued for over 5 years , after which he created HISDA.
2007 Introduced Commando krav maga to Australia under Moni Issac, then redeveloped CKM to Integrated Combat over 7 years 
Reconnected with GM Yun 2017- 2022 (5 years ) to develop the 2nd generation of Yun Jung Do.
in the background Graham advanced his education achieving diplomas in sport coaching and Persona training-fitness as well as a TAFE teacher then further still achieved a university degree in Med-Science (chiropractic) as well as his
Masters certification in Dry needling (acupuncture)
(this course recognized by medical and chiropractic associations) .

TO BE A GENUINE INSTRUCTOR -TEACHER  
You must have been taught by the best (1 to 1) over TIME 
To be a Master Tradesman you must first be an apprentice.

The QUESTION YOU MUST ASK ANY INSTRUCTOR IS
(1)
WHO TAUGHT YOU ?
(2)
FOR HOW LONG WERE YOU TAUGHT ? Years ? 
(3)
Were You under personal tuition by any Master and for how long? did you serve your apprenticeship?
(this means personal (1 to 1 tuition) as in Master and apprentice)
The  (I've attended a seminar or bought a certificate is not the same thing)  

The trouble with many of todays martial arts schools is that they cannot answer these questions because most have just
PURCHASED THEIR CERTIFICATES WITHOUT SPENDING ANY REAL TIME STUDYING THAT ART UNDER
THE DIRECT TUITION OF A RECOGNIZED MASTER INSTRUCTOR 
OR HAVING TRAINED (1 to 1) BY A GENUINE MASTER OVER TIME .
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Imagine if you go to University and get a Degree WITHOUT DOING THE MINIMUM YEARS OF STUDY ? 
Not only are you kidding yourself, you are defrauding your students and their parents .
Plus HOW CAN YOU HAVE ANY CONFIDENCE IN WHAT YOU ARE TEACHING 
IF YOU HAVE A CERTIFICATE
BUT HAVE NOT ACHIEVED THE RELEVANT COMPETENCY OVER TIME ?
______________________________________________

At Healy's Integrated Self-defence Academy (HISDA) and Yun Jung Do we have the history and credible track record
and the right connections with authentic Masters in each of our 3 base systems .

SO WHAT YOU ARE TAUGHT IS AUTHENTIC and the REAL DEAL .

Graham Healy