Ratna Vajra Rinpoche is considered one of the highest qualified lineage masters of both the esoteric and exoteric traditions of Buddhist philosophy and meditation. He is a descendant of the famous Khon  family in Tibet, which holds an unbroken lineage of great and famous masters for over a thousand years. He is the eldest son of the present 41st Sakya Trizin, the throne holder of the Sakya tradition of Tibetan Buddhism. He teaches Buddhism and travels extensively throughout Europe, Asia, Australia, New Zealand and North America.

Source: https://en.wikipedia.org/wiki/Ratna_Vajra_Rinpoche