The Office of Internal Oversight Services is the internal oversight body of the United Nations. Established in 1994 by the General Assembly, the office 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. The Office aims to be an agent of change that promotes responsible administration of resources, a culture of accountability and transparency, and improved programme performance. See more


Improving operational efficiency
INTERNAL AUDIT: The Internal Audit Division performs risk-based audits applying the International Standards for the Professional Practice of Internal Auditing to assist management in establishing and strengthening risk management, internal control and governance using a combination of assurance and advisory services:
Strengthening programmes' impact
EVALUATIONS:The Inspection & Evaluation Division strengthen accountability, learning, relevance, efficiency, effectiveness and impact in the implementation of programmes as well as to ensure the outcomes of evaluation have corresponding impact on strategic planning:
Protecting the UN's integrity
INVESTIGATIONS: The Investigations Division investigates, with assurances of confidentiality reports of possible misconduct and makes recommendations for appropriate action to ensure that the Organization can more effectively promote accountability:
In focus: Office of Internal Oversight Services marks 20th anniversary
The Office of Internal Oversight Services marked its 20th anniversary on 29 July 2014. Since its establishment on 29 July 1994, OIOS has expanded its services with staff based in New York, Geneva, Nairobi, Vienna, as well as peacekeeping and other special missions. OIOS colleagues have been striving to fortify a strong and accountable UN through world-class internal oversight service, including internal audit, inspection, monitoring, evaluation and investigation. OIOS’ Oversight Functions Commemorating 20 years of commitment
to the goal of helping the organization to fulfil its mandate in a more efficient and effective manner, OIOS will conduct a series of events focusing on “Risk-based Oversight – Delivering Results that Make a Difference”. The events will celebrate past achievements but more importantly demonstrate how OIOS will keep its promise to stakeholders. A high-level panel, consisting of experts in oversight services and representatives of governing bodies and senior management, will be held on 23 October in New York. See more