The DSWD Field Office IV-B is primarily responsible for the management and implementation of DSWD functions in the MIMAROPA region.

It facilitates direction setting and provides augmentation support and technical assistance to social welfare and development intermediaries within a collaborative environment. This includes local government units particularly the Municipal Social Welfare and Development Office (MSWDO), social welfare and development-related NGOs, private organizations and line agencies.

It also promotes and ensures the implementation and enforcement of laws and policies, rules and regulations pertaining to social welfare and development within its geographical, spatial and cultural jurisdiction.