Swarn Singh had taken his intermediate from Randhir College, Kapurthala. After his M.Sc from Government College, Lahore, he worked as a lecturer in Physics at Khalsa college Lyallpur. In 1946, he was elected a member of the Punjab legislative assembly and secretary of the Panthic party. After Sardar Baldev Singh's induction into India's Interim government he was called upon to join the Punjab Government as a minister. His experience at the bar was his best asset as a minister. He always prepared his brief with diligence and treated everyone with great politeness. He soon became famous for his very charming and immaculate personal manner. He never spoke loudly to anyone.

He spent 23 years of his life as a ranking Cabinet Minister in the Government of India. He was a brilliant debater never dropping a point in polemics. He was a most cool-headed and adroit negotiator. When he needed to do it for diplomatic reasons, he kept the entire international corps enthralled by the magic of his words for as long as he wished., actually having litle to say or wishing little to give away., he handled with incredible calmness many a sizzling issue. He was familiar with several languages and could play them around his fingers with perfect ease. Once he kept the entire audience spell-bound with an uncommon display of his linguistic virtuousity. The occasion was the annual function of the Punjab Languages Department. Sardar Swarn Singh was presiding at the conference. He turned it into a sparkling display of pyrotechnics. The occasion was for honouring Dr. Ganda Singh, the punjab historian and savant. There were four conference languages and one had the choice to use anyone of these. Swarn Singh who was presiding started off speaking in English. Midway, he suddenly switched over to his polished Urdu. Then it was his precious Hindi, and finally his vintage doaba Punjabi. He combined with his bonmots and witticisms his inborn wisdom and maturity. that was Swaran Singh at his oratorical best.

Speech was not Swaran Singh's only forte. He was a deep-thinking, very level-headed statesman. He could see through intricate problems with clear, undimmed eye. He was Jawaharlal's closest advisor on matters political as well as diplomatic. In the corridors of power, his advice was regarded with special attention.

Swaran Singh joined Jawaharlal Nehru's cabinet when it was formed after the nation's first general election in 1952. He was minister for works, Housing and Supply in that Cabinet, 1952-57; for Steel, Mines and fuel; 1957-62, for Railways 1962;for Food and agriculture 1963-64; for Industry and supply in Lal Bahadur Shastri's Cabinet, 1964, for external affairs, 1964-66; for Defence with Indira Gandhi, 1966-1970; for external affairs 1970-74; and for defence again 1974-75.

He assisted Jawaharlal Nehru in his talks with the Chinese leader; Chou-En-Lai, on the Indo-China border question in 1960. He was with the Indian delegation for its six rounds of talks with pakistan, 1962-63. He led the Indian delegation to the United Nations several times. He attended all meetings of the Heads of Commonwealth nations and led the Indian delegation at all summit meetings of non-aligned governments during that period. He was named by Indira Gandhi her special envoy to Pakistan, Indonesia and Nigeria in 1980.

From 1976-81, he was president of Indian Council of World affairs. He was member of the Eminent Person's Group constituted by the United Nations General Assembly. Most of his retired years were spent working for UNESCO where he again earned a great name for himself for his application and readiness of mind. He was Vice-Chairman of the UNESCO Board., 1984-86. The last years of his life were reserved for the Bhai Vir Singh Sadan, an institute devoted to the study of Sikh letters.

The catalogue of portfolios held by him from time to time will show how indefatigable Swaran Singh was. And how versatile : From Railways to External Affairs, he proved equal to anything that came his way. He never lost his natural cool or his human touch. In his personal life he was the cleanest of men, completely above personal aggrandizement. He was of very simple habits. Simple living was the overarching principle of his life. He drove his own car. Attending international meetings and conferences on the behalf o fthe nation, he himself washed his personal linen. His daughters cycled to school. He joined most naturallly occasions of sorrow and joy in his village. He was most informal of men. He never travelled to his village with the eclat of a Cabinet Minister. He was a man of long-lasting friendships. His closest friend in the village was a patvari, the aged Harbans singh.

Swaran Singh's virtues were those he had inherited from his father who had served as a non-commissioned officer in the Indian army. After his retirement his father, Jemadar Partap Singh was a member of the Punjab Legislative Council. He was a man of strong character and possessed outstanding administrative talent. He diligently served the Shiromani Gurdwara Prabhandak Committee as president to which office he was called in 1933. He was a man of strict personal rectitude and discipline. As president of the Shiromani Gurdwara Prabhandak committee he established a firm functional apparatus imparting viability to Gurdwara Legislation.

Swaran Singh breathed his last at the residence of his daughter, Dr. Paramjeet Kaur, in Delhi on 30 October 1994.