SAP BI BW professionals are primarily responsible for designing, developing, and maintaining data models, extractors, and reports to meet business requirements. They work closely with business stakeholders and other IT team members to gather requirements, translate them into technical solutions, and ensure data accuracy and performance. On a daily basis, they may analyze data sources, optimize ETL processes, and troubleshoot reporting issues. Collaboration across departments and regular communication with end-users are key aspects of the role, ensuring that business intelligence solutions effectively support the organization's strategic goals.