A Marian devotee and knight of Mary, he is an active member of various Marian groups and organizations in the Philippines and abroad. A sought-after speaker and preacher, Bro. Mars extensively lectures on Mariology, Applied Mariology, Marian Apologetics and Marian Spirituality in different parishes, Marian groups and organizations in the country.
Marwil Llasos had maintained roles in public service as a youth leader and also community worker. He served as SK Councillor, Chairman and ex-officio member of the Sangguniang Barangay of Bgy. Tagas, Daraga, Albay. In 2000, Llasos served as Executive Assistant and Legal Consultant in the Department of Agrarian Reform, appearing as a Resource Person in the House of Representatives Committee on Agrarian Reform.
Platforms/Advocacy of Marwil Llasos
As part of the Ang Kapatiran party, Marwil Llasos is pursuing the strengthening State Universities and Colleges, as well as fiscal autonomy for them. He is also pursuing an extension of Carp Extensions and Reforms (CARPER) to redistribute all agricultural lands to landless farmers, Universal Healthcare and lower power rates to help those in more affected areas and provide cheaper costs of living for everyone.