In today's highly competitive business environment, the implementation of ISO 9001 standards has become essential for organisations aiming to enhance service delivery and achieve customer satisfaction. This study examines the impact of ISO 9001 on service delivery within the logistics department of Sobraga, a leading brewery in Gabon. Utilising a mixed-methods approach, data were collected through in-depth interviews with the logistics department manager, observations, and surveys involving 135 employees. The findings reveal that ISO 9001 implementation significantly improves service quality, reduces non-conformities, and enhances customer satisfaction. However, the study also identifies challenges in employee motivation and communication within the department. The study concludes that while ISO 9001 positively influences service delivery, addressing these identified challenges can further enhance its effectiveness. Practical recommendations for improving ISO 9001 implementation and suggestions for future research are provided to support continuous improvement and sustained organisational performance.