Born in Kurunagala to John M. L. Moonemalle a proctor, he educated at Trinity College, Kandy and became a proctor of the District Court of Kurunagala in 1890. In 1897, he passed the exams to become a proctor of the Supreme Court. He served on several occasions as the acting district judge, commissioner of requests and police magistrate of Kurunagala. In 1906, he was appointed to the Legislative Council of Ceylon.
