Large Scale Agile (LSA) projects present unique challenges in maintaining a positive andsustainable work environment. This study examines the social sustainability factors thatinfluence the LSA project. A multiple case study approach was employed, involving semistructured interviews with software professionals working in three Swedish IT companies.Thematic analysis revealed a network of interrelated eight factors that impact socialsustainability in LSA projects, including trust and communication, learning culture, selforganisation, decision-making, leadership behaviour, and psychological safety. This studyemphasises the human-centred aspects that are crucial for the successful implementation ofLSA projects and the enhancement of social sustainability.