Heidi Reyes Lloce-Mendoza (born November 3, 1962)[1][2] is a former Undersecretary-General for the United Nations Office of Internal Oversight Services.

She played a key role in uncovering irregularities in public funds, earning her a reputation as a staunch advocate against corruption.

[5] On October 6, 2015, Mendoza was nominated by UN Secretary-General Ban Ki-moon to head the United Nations Office of Internal Oversight Services (OIOS), replacing Canadian Carman Lapointe.

[4][6][7] She served in this role until October 17, 2019, overseeing internal audits, investigations, and inspections to ensure the integrity of the United Nations' operations worldwide.

Her platform focuses on empowering budget literacy through legislation that will teach people about the government's financial activities, as well as advocating for the abolishment of any form of pork barrel funding.