His advocacies are poverty alleviation, agriculture development, quality affordable healthcare, eradication of prohibited drugs, adequate and needed infrastructure, and continuous modernization of the assets of the Philippine National Police and the Armed Forces of the Philippines.

He is the brother of former Department of Interior and Local Government (DILG) Secretary Mel Senen S. Sarmiento, who was also Representative of the 1st District of Samar from 2010 to 2016.

His legislative accomplishments include RA10931 which promotes universal access to quality tertiary education; RA11223 which provides Universal Health Care for all Filipinos; RA 11228 which provides for the mandatory PhilHealth coverage of all persons with disability (PWD); RA11055 which establishes the Filipino Identification System; RA10928 which extends the validity of the Philippine Passport; RA10930 which provides for a 5-year validity of Driver's License; and RA11200 which provides for the rank classification in the Philippine National Police, among others.

He was also part of the Philippine Delegation to the 1st Meeting of the AIPA Advisory Council on Dangerous Drugs (AIPACODD) in Singapore.

Rep. Sarmiento obtained his Bachelor of Science in Civil Engineering from the Cebu Institute of Technology.