The implementation of ISO 9001 and ISO 14001 in the manufacturing industry aims to enhance product quality, operational efficiency, and environmental compliance. This study explores the driving factors and benefits of ISO certification through interviews with five manufacturing companies in Indonesia. The findings indicate that certification adoption is driven by customer requirements, government regulations, and international partner demands. Additionally, ISO certification is utilized to standardize production processes and improve quality and environmental management systems. However, companies face challenges related to employee engagement, changes in ISO standards, and the complexity of external audits. Despite these challenges, the benefits of certification outweigh the difficulties, particularly in improving efficiency, regulatory compliance, and business competitiveness. This study suggests that companies should enhance employee involvement, optimize audit systems, and conduct continuous evaluations to maximize the effectiveness of ISO certification.