In 1953, Harbhajan Singh entered the service of the Government of India. Four years later, he graduated with a master's degree in economics.

There, Harbhajan Singh attended Camp College – a hastily put together arrangement for thousands of refugee students – and was an active member of the Sikh Students Federation in Delhi. Khalsa's schooling was interrupted in 1947 by the violent partition of India, when he and his family fled to New Delhi as refugees. Theirs was a well-to-do landlord family, owning most of their village in the foothills of the Himalayas.

Singh learned the fundamentals of Sikhism from his paternal grandfather, Sant Bhai Fateh Singh. His father was raised in the Sikh tradition and young Harbhajan was educated in a Catholic school run by nuns. His mother, a Hindu, was named Harkrishan Kaur. Kartar Singh Puri, served the British Raj as a medical doctor. Harbhajan Singh Khalsa was born on Auginto a Sikh family in Kot Harkarn, Gujranwala district, in the province of Punjab (now in Pakistan).

3.2 Sikh scholars' views on Singh's mission.

One of them commissioned the Thompson Report, which found serious failings in both the methods and the presentation of the Olive Branch Report. Three members of the Siri Singh Sahib Corporation Board, objecting to the hiring of An Olive Branch, an entity not licensed to conduct investigations, resigned their positions. Harbhajan Singh has been accused posthumously of sexual abuse by hundreds of his female followers an investigation called the Olive Branch Report found the allegations most likely true.

He was the spiritual director of the 3HO (Healthy, Happy, Holy Organization) Foundation, with over 300 centers in 35 countries. He introduced his version of Kundalini Yoga to the United States. Harbhajan Singh Khalsa (born Harbhajan Singh Puri) (Aug– October 6, 2004), also known as Yogi Bhajan and Siri Singh Sahib to his followers, was an Indian-born American entrepreneur, yoga guru, and spiritual teacher. Ranbir Singh, Kulbir Singh, Kamaljit Kaur Yogi, Siri Singh Sahib, Bhai Sahib, Panth Rattan Master of Kundalini Yoga, interfaith pioneer, Sikh missionary Healthy, Happy, Holy Organization (3HO), Sikh Dharma International, Kundalini Research Institute, Siri Singh Sahib Corporation Panjab University, New Delhi, India (Master of Economics, 1952), University for Humanistic Studies, Solana Beach, CA, USA (PhD, Psychology of Communication, 1980)

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