John was asked to assist the volleyball tournament by the organization of the East Africa Cup in Tanzania in 2011. His only condition to come over to Tanzania and help the organization was to start also with sitting volleyball during the East Africa Cup 2011, which was approved. By giving a referee course and training courses, sitting volleyball was introduced with a sitting volleyball tournament for youth. In 2021, sitting volleyball is still on the program of the East Africa Cup in Moshi-Tanzania.