Join our team as a Working Student BI and gain hands-on experience migrating enterprise data models from SAP BW on HANA to SAP Datasphere. You will work alongside BI experts, contribute to modern data warehousing solutions, and apply your SQL skills to real-world business data. Working Student Business Intelligence Ref.-Nr.: JR1013190 About the Role As a Working Student in Business Intelligence, you support the migration of existing data models from SAP BW on HANA to SAP Datasphere. You contribute to the implementation of new data models and assist in programming and optimizing data transformations using SQL and SQL Script within the CWS Data Warehouse environment. This role offers hands-on experience in modern data warehousing technologies and close collaboration with BI experts and business users. Key Responsibilities Support the migration and implementation of data models in the CWS Data Warehouse environment (SAP Datasphere) Assist in programming routines to transform and enrich reporting data (e.g., SQL Script) Debug and handle errors in data transformations and routines Align project-related technical questions with internal stakeholders Contribute to the optimization of data structures Support testing and validation of implemented data models Document technical implementations and changes Collaborate with BI teams and users to ensure data quality and usability Your Profile Qualifications Completed vocational education as an IT specialist Ongoing studies in Computer Science or a related IT field Experience & Skills Programming skills, particularly in SQL / SQL Script First experience in creating data models for reporting purposes (e.g., SAP BW, SAP Datasphere) is a plus Strong analytical thinking and ability to work in a team Very good communication skills, both with technical teams and BI users Advanced English skills Basic German skills (nice to have) About CWS Business Services: We, as the Business Service organization, support the four CWS Business Areas Hygiene, Workwear, Cleanrooms and Fire Safety with comprehensive services in the fields of Human Resources, IT, Finance, Legal & Compliance, Procurement and Digitalization. We are proud of our culture in which we can all give our best and bring our own personality to the table. Our success is based on the diversity and commitment of our employees. That's why we foster an inspiring work environment characterized by respect, openness and collaboration. Our company is shaped by different personalities. And yet we have something in common: the courage to embrace change, the joy of helping to shape and improve processes for our customers, and the will to roll up our sleeves and get to work.