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Nikolaos Kourtessis - Sensei

Nikolaos (Nik) Kourtessis - Sensei: 


Nik has trained for over 20 years in Goju Ryu and Goju Kai, with 15 of those years at Australian Goju Karate under Terry Carberry Sensei and his team of highly experienced instructors. Nik has also trained under Patrick Wong Sensei and under Hoban Wong Shihan.

After two years of consistent training, Nik started teaching Karate to kids as an assistant instructor. Just ten months later, Nik graded for and achieved his ShoDan-Ho (Black Belt) successfully. Nik then started teaching kids and teens and adults classes full-time.


Nik has now spent over 30 years independently studying other martial art styles such as Shotokan Karate, Taekwondo, Ninjutsu, Muay Thai, Xtreme Martial Arts, and recently Kobudō. 

Nik has won and placed many times in several state, national & International tournaments, including: Australian Karate Federation (AKF), National All Styles, (NAS), International Sport Karate Association (ISKA), Xtreme Martial Arts (XMA) and other numerous state and national tournaments and continues to do so.

Nik is a qualified and certified martial arts instructor. Nik has a:

- Current Working With Children Check.

- Completed a Level 2 first aid with St John Ambulance Australia.

- Diploma in I.T. networking (Cisco Packet Tracer - CCNA). 

- Certifications in Apple macOS and iOS support. 

Nik is the owner and head writer/artist of a online art and graphic novel company. Nik is also an actor and model that has appeared in Documentaries, Music Videos, Short and Feature Films, including a short role in the 2014 movie I, Frankenstein.

Nik continues to train and learn in different martial arts and coaching methods. Nik also works with many school and community groups across Victoria, including with Proactivity sports provider, teaching Karate and Self Defense, Cardio Fitness, Boxercise and Ninja Warrior, to people of all ages.

“Nik is a highly valued and respected member of the Proactivity team. Nik’s friendly personality creates a great vibe with the children and is someone they look up too. Over the past four years, Nik is a leading facilitator of our *Karate, Self Defence and Boxercise programs in Primary and Secondary Schools across Melbourne and Victoria.” 

Schools include: Catholic Ladies’ College (CLC), East Doncaster Secondary College, Blackburn High School, Highvale Secondary College, Shelford Girls Grammar,  Sacré Coeur, Camberwell South Primary School, Glendal Primary School, Toorak College, St Anthony's Primary School, Wantirna CollegeKilbreda College, Loreto College and lots more.     


“Nik’s key roles and responsibilities are coaching children and young adults aged between 5 – 18 years old, Motivating children to get active and lead a healthy lifestyle. Creating a safe environment for all participants involved, Ensuring all participants are engaged and having fun in our Karate, Self Defence, Boxercise along with other programs he’s involved in.”

Jeremy Djurovich
Managing Director - Proactivity


Nik's Social Media:

Joesph, Sensei

Joseph - Sensei

Tash, Sensei

 Tash - Sensei


Kallista - Senpai

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