Because of his technical approach in Mixed Martial Arts during his active fighting career, he was given the nickname ‘The Specialist’ by his manager.
On his quest to become a complete fighter he started with Brazilian jiu-jitsu at Remco Pardoel's gym in early 1995.
Later that year, he started teaching BJJ and MMA together with his long time training partner Saron Debets.
As a trainer of Golden Glory, he produced multiple World Champions like Alistair Overeem, Marloes Coenen and Siyar Bahadurzada.
Bert van der Ryd joined the team in 2008 and together they organized "A Decade of Fights" in 2009, celebrating Golden Glory's 10 years’ anniversary.
After the sale Martijn stayed two more years with GLORY as a consultant before he moved on and pursued his passion MMA again.
Up to date, close to 1,000 Personal Trainers have been educated in the Tatsujin Training System Mixed Martial Arts, Kickboxing and/or Self-Defense.