The historically marginalized Hatti community, primarily residing in the Trans-Giri region of Sirmaur district, Himachal Pradesh, has recently achieved Scheduled Tribe status. Despite this recognition, a comprehensive understanding of how modernization impacts their traditional socio-economic and cultural fabric remains underexplored. This ethnographic study aims to document these dynamics, utilizing a mixed-methods approach involving a primary survey of 50 households, semi-structured interviews, and participant observation across the Rajgarh and Nohradhar regions. Findings reveal that Hatti society remains deeply rooted in traditional structures, characterized by a hierarchical caste system and the prevalence of patriarchal joint families with distinct patrilineal inheritance patterns. Crucially, the traditional 'Khumbli' council continues to wield significant authority in local governance and dispute resolution, often guided by faith in local Hindu deities like Shirgul Devta and Mahasu Devta. Economically, the community relies heavily on smallholder terrace farming, cultivating traditional staples while increasingly diversifying into cash crops like apples and tomatoes. This agrarian base is further supplemented by livestock rearing and traditional woolen handicraft production, highlighting a gradual shift towards broader market integration. Culturally, the Hatti identity remains remarkably vibrant, actively preserved through a distinct local dialect, unique two-story stone and wood architecture, and robust community participation in regional festivals like Magh, Bisu, and Diwali. Ultimately, the study concludes that the Hatti community is navigating a critical juncture, delicately balancing the preservation of their unique cultural heritage with necessary adaptations to modern economic realities and new socio-political opportunities