[5] His father has also published several books such as Kayika Vidyawa, Saddharma Rathnavali Deepika, Sinhala Mosthara Nirmana and Iganweeme Mooladharma.
Then he worked as a Pisces Father at St. Sebastian's College, Moratuwa from 1959 to 1960 and later at St. Joseph of Pamunugama in 1960 and finally at Dehiwala St Mary's Church from 1960 to 1962.
Poruthota then became the pastor of several parishes including Dehiyagatha (1962–66), Kelaniya (1967–74), Kalutara Kalmulla (1974–82), Kotte (1982–87), Wattala (1991–97) and Dehiwala (1997-2004).
Father Poruthota was involved in conducting pilgrimages of Sri Lanka in Sinhala language instead of Latin.
Therefore, he played an important role in instilling this new revolution into the Sri Lankan Catholic Church as well as the lay people.
Then he wrote the book Kithunu Peraliya, which analyzed in detail how the views of the Second Vatican discourse affect Sri Lanka.
In 1958, while serving in the Kotahena Parish, he wrote the book Wurthiya samithi Viplawaya emphasizing the importance of the absence of trade union politics.
Jayalath Balagalla, Poruthota launched 456-pages and 404-pages books with two-volumes titled Katholika Samaaja Dharshanaya.
The Most Venerable Mapalagamagama Vipulasara Thero was a close friend of his, where Poruthota contributed to the Buddhism as well.
[2][11] In 1970, Father Poruthota pioneered the establishment of the Sri Lankan branch of International Catholic Film Organization (OCIC) when he was a Kelaniya staff member.
The ceremony was held on 21 December 1971 with the participation of Cardinal Thomas Cooray, Archbishop of Colombo.
[2][11][6] Since 1981, Father Poruthota took the initiative to present the awards for Sri Lankan Tamil films and short and semi-narratives.