She was appointed executive assistant and then administrative officer in the Office of the Mayor of Marikina, designated as social secretary of the Mayor and secretary in the Municipal Council. Later, she also acted as director of the Marikina Shoe Development Council and supervised the activities of the Marikina Anti-Drug Abuse Council e.g., seminars and trainings conducted in Tagaytay City. Cebu and Davao, tapping the youth and LGU officials all over the Philippines, with the assistance of the Dangerous Drugs Board.
In the Development Academy of the Philippines, she was a financial analyst, then accounting and budget supervisor in the Comptroller’s Office, and finally an internal auditor in the Internal Auditing Office. She was a member of the team which designed the administrative operational manual of a local university.
She retired early from the city government of Marikina but was invited to teach English and Political Science in college and at the same time work as a consultant in the Office of the University President. She finally retired from the university in May 2020.
Ms. Santos is an active member of several civic and cultural organizations and is pro- Nature, She made the entry of Marikina, Save the Marikina River, in the National Search for Best Practices in LGUs. This entry won for Marikina its first major national award. Her recent composition, Making Rivers not Sewers, poses a challenge to developmental planners and engineers to redesign the flow of liquid wastes and water from households and industries to sewers and not directly to rivers from Rodriguez to Pasig.