Maharaj Charan Singh ji

Sant Charan Singh Ji Grewal (1916–1990), Satguru and head of Radha Soami Satsang Beas, was named successor in 1951 by Sardar Bahadur Jagat Singh Ji. He served the Beas sangat for almost four decades, until his death in 1990 at the age of 73. Before his appointment he practiced law in Hisar and Sirsa, India. He was an initiate of Baba Sawan Singh, his paternal grandfather and predecessor of Sardar Bahadur Jagat Singh. Charan Singh Ji Maharaj assigned the duties of successor and guru to Baba Gurinder Singh Dhillon, his initiate and nephew.

Source - Wikipedia