Advocacy is indeed a cornerstone of social work, particularly when addressing the needs of Particularly Vulnerable Tribal Groups (PVTGs) and combating systemic injustices. Social work advocacy aims to amplify the voices of marginalized groups, push for policy change, and ensure that PVTGs have equitable access to resources and opportunities. Advocacy in this context seeks to address historical neglect, socio-economic disparities, and the erosion of cultural identities, which have left these communities vulnerable to exploitation and exclusion. By engaging in systematic advocacy, social workers work to eliminate barriers that perpetuate inequalities and push for the inclusion of PVTGs in mainstream development processes. The goal is not only to empower these communities but also to ensure that their rights are recognized and their needs are met. The Field Action Program of Madras Christian College, India, involves educating, advocating, and influencing policies through direct support to bring systematic change in showcasing the professional commitment of social work student community to foster social justice and equitable change. This program involves social workers as advocates to ensure that the rights of vulnerable populations are safeguarded and bringing change from below. This chapter employs a qualitative, practice-based approach to analyze the integration of systematic advocacy within Field Action Projects (FAPs) as a transformative approach to community development aimed at reducing inequalities. Using a case study method, it explores three key FAPs: developing a tribal resource handbook, facilitating the relocation of tribal families to modern colonies, and rehabilitating bonded labor survivors. Guided by theories of empowerment, social capital, and structural advocacy, these projects highlight participatory methodologies, capacity building, and rights-based interventions. The findings underscore how systematic advocacy fosters resilience, addresses structural disparities, and promotes sustainable development in marginalized communities.