He was educated at S. Thomas' Preparatory School and at D. S. Senanayake College.
He worked as a reforestation officer in the State Timber Corporation, until he resigned in 1993 to contest the Provincial Council of the Western Province and was elected a Member of Provincial Council.
[1] He married Mrkalandalage Jeewani Namal Gunawardana, daughter of Air Chief Marshal Terance Gunawardana, former Commander of the Sri Lanka Air Force.
They have one son Chamith Praween Dias Bandaranaike.
This article about a politician from Western Province, Sri Lanka is a stub.