He was the founder of the Divine Life Society (DLS) in 1936, Yoga-Vedanta Forest Academy (1948) and author of over 200 books on yoga, Vedanta, and a variety of subjects.

He established Sivananda Ashram, the headquarters of the DLS, on the bank of the Ganges at Muni Ki Reti, 3 kilometres (1.9 mi) from Rishikesh, and lived most of his life there.

His birth took place during the early hours of the morning as the Bharani star was rising in Pattamadai village in Tirunelveli district, Tamil Nadu.

Upon graduation, he practiced medicine and worked as a doctor in British Malaya for ten years, with a reputation for providing free treatment to poor patients.

Over time, a sense that medicine was healing on a superficial level grew in Dr. Kuppuswami, urging him to look elsewhere to fill the void, and in 1923 he left Malaya and returned to India to pursue his spiritual quest.

[7] Upon his return to India in 1924, he went to Rishikesh where he met his guru, Vishvananda Saraswati, who initiated him into the Sannyasa order, and gave him his monastic name.

[10] His Belgian devotee André Van Lysebeth wrote that his critics "disapproved of both his modern methods of diffusion, and his propagation of yoga on such a grand scale to the general public", explaining that Sivananda was advocating a practice that everybody could do, combining "some asanas, a little pranayama, a little meditation and bhakti; well, a little of everything".

[10][11] The 9th All-India Divine Life Convention was held at Venkatagiri on March 16, 1957, which was presided by Sathya Sai Baba and attended by Satchidananda Saraswati and Swami Sadananda.