Meet the team

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

If you would like to learn more about private lessons with our coaches, feel free to send us an email or inquire about the options at the front desk.

Daniel de Groot


Daniel de Groot is the head coach at Haven BJJ. He is a BJJ black belt with extensive competition and coaching experience. Daniel is the first Dutchman to ever win the Brazilian Championships. Additionally, he is a European champion and has earned medals at the prestigious ADCC Trials. His students have won some of the biggest competitions in Europe.


Denis Savage (yes, that's his real name!) is a talented instructor and coach at Haven BJJ. He is known for giving 100% in everything he does. Whether it's teaching classes, coaching at competitions, training, studying jiu jitsu, or helping his friends and teammates, Denis always brings his A-game. When he's not teaching or training in jiu jitsu, he works as a high school teacher.


Bart is one of the most technical jiu jitsu practitioners in the country. He utilizes his analytical skills to find solutions to any problem encountered by himself, his students, and teammates. Bart is a successful athlete, recognized as one of the top featherweights in the world. He is the current vice-world champion in the no-gi division. In addition to training and teaching jiu jitsu, Bart works part-time in data analysis.


Sarah leads our women's program with passion and expertise. She is a dedicated athlete and coach who combines her love for jiu jitsu with a career in nutrition, assisting various top athletes with their diets. Sarah has also created one of the strongest training groups for women in the Netherlands, fostering a supportive and empowering environment for female practitioners.

Luuk Aaron van Nieuwamerongen


'Big' Luuk is one of the most knowledgeable instructors you'll encounter. He is deeply passionate about jiu jitsu and has a strong focus on learning and teaching in the most efficient way possible. Luuk is a European champion and a veteran of many super fight organizations. His expertise and experience make him a valuable asset to our team.

Kim Los


Kim is one of our Ladies Only instructors. She successfully balances her full-time job with training in fitness and jiu jitsu. As a medalist in the European Championships, Kim brings a wealth of experience to her coaching. She is known for her patience and ability to provide guidance to her students in a supportive and encouraging manner.

Alex Schors


Alex is one of our most dedicated athletes and also leads our kids program. As a patient and experienced teacher, he is committed to bringing out the best in everyone. Alex's passion for teaching and his ability to connect with children make him an excellent mentor for our young practitioners.

Marnix van Gent


Marnix is a lifelong martial artist and one of our kids' coaches. He was previously a Dutch champion in Wing Chun but has now fully dedicated himself to Brazilian Jiu Jitsu. Marnix brings a diverse range of skills and experiences to his coaching, ensuring a well-rounded training approach for our young students.

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