As a knowledge-based organization, the most valuable resource of the UNAIDS Secretariat is the expertise, skills, experience and motivation of its staff. Several initiatives have been undertaken to foster a dynamic and adaptable workforce through the promotion of learning and staff development programmes and improving performance management. To better support the needs of staff, the UNAIDS Secretariat has modernized its human resources policies to promote greater organizational effectiveness, including revised policies on flexible working arrangements and performance management.