He was elected to the Lok Sabha, the lower house of the Parliament of India from the Tarn Taran constituency of Punjab as a member of the Indian National Congress.

[5] Majithia was commissioned a pilot officer in the flying branch of the Indian Air Force Volunteer Reserve on 8 November 1939, two months after the start of the Second World War.

[6] He rose to command a fighter squadron until he left the Air Force in 1944 to pursue a political career.

[7] From 1945 to 1947, he was member of Central Legislative Assembly, served on the Defence Consultative Committee and was principal of Khalsa College, Amritsar.

[7] After independence in 1947, he was promoted to honorary wing commander in the (Royal) Indian Air Force and appointed ambassador to the neighbouring country of Nepal, where he remained until 1949.