[2] She also has a master's degree in education, and a mention in research and higher teaching from the Hermilio Valdizán National University [es] (UNHEVAL).

[2] On 7 January 2019, Tomás was sworn in as Minister of Health during the government of Martín Vizcarra, replacing Silvia Pessah, who had resigned due to personal problems.

[6] On 17 April 2019, after former President Alan García shot himself in the temple and was transferred to Casimiro Ulloa Hospital [es], a medical team led by Tomás took over his care, diagnosing a bullet impact, entry, and exit in the head, and later giving details of his death after suffering a brain injury.

015-2019-SA, published in the official newspaper El Peruano, octagon-shaped labels were made compulsory in order to provide health information to all citizens.

[15][16] On 17 November 2019, the journalistic program Panorama [es] revealed that Tomás had hired Luz Parra Galván, the mother of her son's partner, as head of teaching and research at the María Auxiliadora hospital through a ministerial resolution.

[17] It was also announced that when Tomás took office, the woman's father, Mariano Alarcon Guevara, who also worked at the Maria Auxiliadora hospital, was given a 15-day suspension rather than a dismissal he had incurred for misconduct under the previous management.