The United Nations Office for Project Services (UNOPS) has a mandate to provide efficient and effective project management, procurement, and infrastructure services to help implement sustainable development projects. UNOPS is focused on helping its partners achieve their development goals, particularly in the areas of peace and security, humanitarian assistance, and sustainable development.

The specific mandate of UNOPS is outlined in its charter and governed by its Executive Board, which is composed of representatives from UN member states. The mandate includes:

1. Providing project management support to UN agencies, governments, and other partners to help implement development projects in a timely and efficient manner.
2. Offering procurement services to partners to help them source goods and services in an effective and transparent manner.
3. Supporting infrastructure development and management for sustainable development projects, including the design, construction, and maintenance of infrastructure such as roads, buildings, and water supply systems.
4. Supporting humanitarian and peacekeeping operations by providing operational support, including logistics, procurement, and infrastructure management.
5. Building the capacity of governments and other partners to manage projects and implement sustainable development initiatives.

Overall, the mandate of UNOPS is to help its partners achieve their development goals and contribute to a more sustainable and peaceful world.