Diversity within the workplace in terms of race, gender, age, cultural, and professional experiences has also become a strategic process of improving the performance of the organization and ensuring employee satisfaction. It explores the connection between the dimensions of diversity and employee outcome utilizing a mixed-method that combines both quantitative survey data and qualitative interviews of three corporate segments in India namely technology, manufacturing, and service sectors. Structured questionnaires answered by 450 employees and in-depth interviews of 30 participants were conducted in order to capture subtle nuances of: belonging inclusivity and culture within an organization. The methods of correlation and multiple regression were used in the analysis to quantify both how diversity management practices are associated with job performance (productivity, innovation, and teamwork indicators) and satisfaction measures (engagement, intent to remain, workplace morale). The findings show that gender and cultural diversity has a high correlation with better creativity, problem solving ability and age diversity levels have moderate correlation with knowledge sharing and efficacy in mentoring. On the contrary, lack of inclusive policies was associated with lower engagement and intentions of leaving. The results point out that diversity does not necessarily bring about good results, instead, its influence is moderated by leadership pledge and equitable policy, and an inclusive climate. The study highlights the need to integrate diversity management within core HR practices so as to ensure that an organization not only benefits the most but also promotes the wellness of the employees.