Meet the team

Our coaches have years of teaching experience at home and abroad. Their goal is to share their knowledge with you so that you can become the best jiu jitsu practitioner you can be. Each of the coaches has his or her own specialties, but they all follow our proven curriculum.

If you want to know more about private lessons with the coaches, feel free to send us an e-mail or ask about the possibilities at the desk.

Daniel de Groot


Daniel de Groot is the head coach at Haven BJJ. He is a BJJ black belt with a lot of competition and coaching experience. Daniel is the first Dutchman ever to win the Brazilian championships. He is also European champion and medalist at the prestigious ADCC Trials. His students have won some of the biggest competitions in Europe


Denis Savage (that's his real name!) is a gifted teacher and coach at Haven BJJ. He is known for always giving 100%. Not only when he teaches, but also when he coaches competitions, trains, studies jiu jitsu or helps his friends and teammates. When he is not teaching or training jiu jitsu, he is a high school teacher.


Bart is one of the most technical jiu jitsu practitioners in the country. He uses his analytical skills to find solutions to any problem he and his students and teammates encounter. Bart is a successful athlete, recognized as one of the best featherweights in the world. He is the current nogi vice world champion. Besides training and teaching jiu jitsu, Bart works part-time in data analysis

Sarah Tuohy

Sarah is in charge of the women's program. She is an avid participant and instructor. She combines her passion for jiu jitsu with a career in nutrition, helping several top athletes with their diet. She also created one of the strongest women's training groups in the Netherlands.

Luuk Aaron van Nieuwamerongen


'Big' Luuk is one of the most knowledgeable instructors you will meet. He is obsessed with jiu jitsu and learning and teaching it in the most efficient way. Luuk is European champion and a veteran of many super fight organizations.

Kim Los

Kim Los

Kim is one of our Ladies Only instructors. Kim combines her full-time job with fitness and jiu jitsu training. She is a medalist at the European Championships and is a very patient teacher

Alex Schors


Alex is one of our most driven athletes. He is also the head of our kids program. He is a patient and experienced teacher who wants to get the best out of everyone.

Marnix van Gent


Marnix is a lifelong martial artist and one of our children's coaches. After becoming Dutch Wing Chun, he devoted himself to Brazilian Jiu Jitsu.