The conservation and restoration of historic monuments require an interdisciplinary approach that combines technical, cultural, and environmental knowledge. This study analyzes how integrating industrial engineering, architecture, and heritage specialties can optimize sustainable restoration processes in the Cathedral of Zapotlán el Grande, a cultural and historical landmark in the region. A methodology based on efficient management processes and Kaizen events was implemented and adapted to the context of heritage restoration. The initial diagnosis included the analysis of the condition of the monument using advanced technologies, while the planning and execution incorporated sustainability principles, such as the reuse of materials, the reduction of construction and demolition waste (CDW), and the use of digital tools to optimize resources. Kaizen events facilitated continuous improvement at each stage of the project, allowing critical areas in the processes to be identified and solved collaboratively. The results show a significant reduction in the use of non-renewable resources, increased operational efficiency, and better communication between interdisciplinary teams. In addition, the historical and cultural value of the monument was preserved while minimizing the environmental impact and strengthening awareness of sustainability in heritage management. This work model, which combines engineering, architecture, and heritage, offers a replicable strategy for sustainable restoration projects in historical monuments.