Maria Rosario Clarissa Singh-Vergeire[3][4] (born Maria Rosario Clarissa Dumandan Singh) is a Filipino physician and public health official currently serving as the top undersecretary of the Department of Health.

[5] She also served as the officer in charge of the department from July 14, 2022, to June 5, 2023, following her appointment by President Bongbong Marcos.

Vergeire earned her bachelor's degree in zoology from the University of Santo Tomas and her Doctor of Medicine degree from De La Salle College of Medicine (now De La Salle Medical and Health Sciences Institute).

She later earned a Master of Public Health degree from the University of the Philippines Manila.

[2][9] Starting in 1996, Vergeire spent 11 years working at the Marikina City Health Office.