Leading the vision

The Under-Secretary-General for Internal Oversight Services is appointed by the Secretary-General, following consultations with Member States, and approved by the General Assembly for a non-renewable five-year term. The Under-Secretary-General assists the Secretary-General in fulfilling his oversight responsibilities in respect of the resources and staff of the Organization through the provision of audit, investigation, inspection, and evaluation services.

Ms. Heidi Mendoza, Under-Secretary-General

Ms Heidi Mendoza, credit UN Photo Eskinder Debebe

Ms. Heidi Mendoza of the Philippines was sworn in as Under-Secretary-General for Internal Oversight Services to head the Office of the Internal Oversight Services (OIOS), on 14 December 2015 for a five-year non-renewable term.

As an internationally respected auditor and anti-corruption champion, Ms. Mendoza has more than 20 years of service in government, particularly in the field of audit, investigation, fraud examination, anti-corruption and integrity advocacy. Prior to joining the United Nations, Ms. Mendoza served as Commissioner at the Commission on Audit with the Government of Philippines (from 2011 to 2015) where she headed the Foreign Based Embassies and International Audit Committee and led the successful bid of the Philippine Commission on Audit as external Auditor of International Labour Organization (ILO) in 2015.

Ms. Mendoza was previously governance and anti-corruption consultant for the Asian Development Bank and the Australian Agency for International Development. She was also an Accounting and Internal Audit Expert for ALTAIR-European Commission, Local Government Procurement Specialist for the World Bank in Manila as well as a corruption prevention course module writer with the United States Agency for International Development (USAID) Rule of Law Effectiveness Project.

Ms. Mendoza holds a Master's degree in National Security from the National Defense College of the Philippines and a Master in Public Administration with specialization in Fiscal Administration from the University of the Philippines and, has passed the Certified Public Accountant Licensure Examination. She is an honourary member of the Association of Certified Fraud Examiners in the Philippines and affiliated with both the International Organizations of Supreme Audit Institutions and Asian Organizations of Supreme Audit Institutions.

Mr. David Kanja, Assistant Secretary-General

Mr. David KanjaMr. David Kanja was appointed as the Assistant Secretary-General for Internal Oversight Services in June 2012. He was the Director of the United Nations Children's Fund (UNICEF) Office of Internal Audit and Investigations from 2010 to 2012. From 1992 to 2010, he served at the World Bank Group in various positions including as Chief Auditor for audit quality and strategy, Audit Manager and Acting Auditor General. Prior to that, he served for nine years at one of the Big Four audit firms, Deloitte, in various positions including as Audit Manager in the United Kingdom and Senior Manager in Kenya. Mr. Kanja also served as a Chair and member of UNICEF’s Audit Advisory Committee from 2006 to 2009. 

Mr. Kanja is active in oversight professional activities and has served as a member of the Institute of Internal Auditors’ Board of Regents, Exam Development Committee, and Committee of Research and Education Advisers. He has served as a team member of IIA external quality assessments of a number of international organizations and has also served as an instructor on numerous Certified Internal Auditor (CIA) examination review courses.

He is a Certified Internal Auditor, Chartered Accountant (England and Wales) and Certified Public Accountant (Kenya) as well as a commerce graduate (First Class Honours) from the University of Nairobi. When he took the Certified Internal Auditor examination in 1992, Mr. Kanja won the Institute of Internal Auditors (IIA) Gold Medal award for the highest worldwide overall score.