The Deaf Sustainance and Development Organisation is registered under the Non-Governmental Organisation Act 2002. This organisation was established by a group of deaf persons who were formerly under a Community-Based Organisation registered locally as Jamii ya Viziwi Njombe Tanzania (JAVINTA).

The organisation was established with the am to promote equality, advocate inclusiveness and promote skills for sustainable development for all, including persons with disabilities.

Sign Language-Pro Integration and Access is a participatory initiative designed by DDSO run by deaf people in Njombe region. The action is designed to serve the deaf community which is experiencing social political and economic exclusion as a result of communication barriers existing among the deaf themselves, social service providers, local government administrators and the community at large. Specifically, the project aims at advocating for integration and access by deaf people in Njombe Region through inclusive sign language.

This initiative is in line with the Persons With Disability Act, 2010 that strives, among other objectives, to promote accessibility and integration, by people with disabilities, including deaf people. Relevant to the Persons With Disability Act, 2010, this initiative increases access to social services and community support services including personal assistance, sign language interpretation and integration in community access to information about available support services for deaf people