Dilgo Khyentse
For a time Khen Rinpoche was the only professor and administrator of the Nyingma Department, where he taught for 17 years, up to 13 classes a day in the first years while writing the text from Mipham Rinpoche on a blackboard. Dilgo Khyentse Rinpoche and other Nyingma teachers were pleased with his role and extended more teaching opportunities at other occasions. Dilgo Khyentse bestowed Chogyur Lingpa's Terma, Jigme Lingpa's Nyingtik Tsapo, and both oral transmissions and commentaries on the Guhyagarbha Tantra to Khen Rinpoche, and became his root lama.