The integration of Artificial Intelligence (AI) into the fabric of various industries marks a pivotal shift in the landscape of human capital management and development. This article, "Redefining Human Capital in the Age of Artificial Intelligence: Challenges and Opportunities," delves into the nuanced implications of AI on the workforce, leveraging insights from HR professionals, business leaders, and employees across diverse sectors. Through a comprehensive literature review, the study highlights key advancements in AI technologies and their transformative potential across the workplace, from enhancing operational efficiencies to reshaping job roles and skill requirements. The research employs a qualitative methodology, conducting semi-structured interviews with 21 participants from sectors such as finance, education, technology, and public administration, to explore the multifaceted impact of AI integration. Findings reveal significant themes including the transformation of job roles, the critical need for skill development and adaptation, strategic organizational approaches to AI integration, ethical considerations, and the profound influence on organizational culture. The discussion offers practical recommendations for navigating AI-related changes, acknowledging the limitations of the study's scope and suggesting directions for future research. This article contributes to the discourse on AI and human capital, providing a foundational understanding of the challenges and opportunities presented by AI, and advocating for strategic, adaptive, and ethical approaches to harness its potential for the benefit of the workforce and society at large.