Meteosim, a company specializing in meteorological and environmental services, has successfully integrated Apache Airflow with the Slurm workload manager to streamline their high-performance computing (HPC) workflows. This integration enables the company to orchestrate complex simulations across multiple Slurm-managed compute clusters while optimizing resource utilization, maintaining service uptime, and simplifying data pipeline creation. Prior to adopting Airflow, Meteosim faced challenges with Crontab chaos and manual monitoring tools, which drove them to adopt a scalable solution for orchestrating their pipelines. The integration architecture features deferrable operators, custom-built integrations, and Redis as a messaging layer to manage job states and ensure reliability. This innovative use of Airflow and Slurm has delivered significant benefits, including scalability, reliability, ease of use, and continuous improvement, resulting in zero downtime across 6,000 pipelines.