He has a breadth and a depth to his yoga experience like few other yoga teachers in the world. David is a one of a handful of teachers worldwide to be given authorization directly from Pattabhi Jois, a guru of Ashtanga yoga. David is an extremely highly qualified yoga teacher with a huge background in Iyengar and Ashtanga and he deepens the practice by including many inner techniques of Swami Satyananda Saraswati.