Seeneevassen was born in Port Louis, Mauritius at a house located at the corner of Bourbon Street and Léoville L'Homme Street. Both his father and mother had migrated to Mauritius from India. In 1915 he attended the subsidised school
L’église de l’Angleterre located at Rue Arsenal. Then he attended the Central Boys government school located at Rue La Paix, and the Sunnee Surtee school at Rémy Ollier Road. In 1921, Seeneevassen started his secondary education at
Royal College Curepipe and 8 years later he completed his Higher School Certificate (HSC), coming out as the 4th best student in Mauritius in 1929. Seeneevassen studied law at the
London School of Economics (LSE). During his studies his instructor P.R. Larski introduced Seeneevassen to famous figures such as Mahatma Gandhi and
Jawaharlal Nehru in 1935. On 17 April 1940, he was called to the bar at the
Middle Temple after graduating with a law degree. He soon returned to Mauritius where he practised law. He then worked as Liaison Officer at the Ministry of Health. ==Family life==